Global regulations concerning plastic waste, food-contact materials, and extended producer responsibility are becoming increasingly strict. Sustainability, material traceability, and regulatory compliance are now important factors in packaging procurement decisions.

Brands can no longer select packaging suppliers based solely on unit price. For food, medical devices, consumer goods, electronics, and industrial components, procurement teams must also evaluate material selection, tooling development, thermoforming capabilities, quality control, and order fulfillment capacity.

When selecting a reliable Clamshell Packaging Manufacturer, buyers should consider the following questions:

• Does the supplier offer custom tooling and sample development?

• Can it provide PET, rPET, PP, PS, or other materials suitable for the intended application?

• Does it have a complete quality inspection and material traceability process?

• Can it manufacture food-grade, medical-grade, or industrial packaging?

• Does it offer both stock packaging and custom packaging solutions?

• Does it have stable mass-production and delivery capabilities?

The following list is based on the products and manufacturing capabilities publicly presented on each company’s official website. It is intended for preliminary supplier screening and should not be interpreted as an absolute ranking based on revenue or global market share.

How to Evaluate a Clamshell Packaging Manufacturer

Production and Customization Capabilities

Buyers should determine whether a supplier only sells standard packaging or provides a complete development process covering product measurement, structural design, prototyping, tooling, and mass thermoforming production.

For custom projects, procurement teams should ask:

• Can the supplier design packaging based on physical samples, drawings, or 3D files?

• Is the tooling developed in-house?

• Can the supplier provide prototypes and pilot production?

• Are different materials and thicknesses available?

• Can the supplier control cavity, snap-lock, and hinge dimensions?

• What steps are required from sample approval to mass production?

Quality Control

Clamshell packaging quality cannot be assessed through appearance alone. Important quality factors include:

• Hinge durability after repeated opening and closing;

• Snap-lock closure strength;

• Fit between the packaging and the product;

• Smooth and consistent trimming;

• Absence of cracks, bubbles, distortion, or surface defects;

• Resistance to accidental opening during stacking and transportation;

• Hygiene controls required for food or medical applications.

For custom packaging projects, buyers should request physical samples and perform product loading, drop, transport, stacking, opening, and closure tests.

Material Flexibility

A supplier should recommend materials according to the application rather than use one type of plastic for every project.

For example:

• PET generally offers good clarity and is commonly used for retail display and food packaging;

• rPET can increase the amount of post-consumer recycled content in the package;

• PP may be suitable for certain food applications requiring heat resistance or microwave use;

• PETG is commonly used in selected medical and high-clarity thermoforming applications;

• PVC is still used in some traditional blister packaging applications, but its suitability should be evaluated according to target-market regulations and the brand’s sustainability requirements.

Top 10 Clamshell Packaging Manufacturers in The World

1. Hangzhou Kesheng Packaging Material Co., Ltd.

Location: Hangzhou, China

Main Products: Food blister packaging, ice cream and gelato packaging, medical blister packaging, cosmetic blister packaging, industrial clamshell packaging, consumer product packaging, and toy blister packaging.

According to its official website, Kesheng Packaging entered the blister packaging industry in 2000 and formally established Kesheng Packaging in 2017. The company primarily provides custom blister and thermoformed packaging solutions.

Its publicly listed product categories cover food, medical devices, tablets and ampoules, cosmetics, electronics, hardware components, consumer products, and toys.

In food packaging, Kesheng publicly presents PET, PVC, PS, and PP material options, along with customization of size, shape, transparency, and sealing method.

Its product range includes:

• Macaron trays;

• Sushi trays;

• Pastry containers;

• Fruit containers;

• Salad bowls;

• Egg cartons;

• Roasted chicken containers;

• Other thermoformed food packaging products.

For medical packaging, the company states that it operates a Class 10,000 cleanroom and manufactures medical device trays, tablet blister packaging, ampoule trays, and other medical thermoformed products.

The company also publicly states that it has obtained ISO 9001 and ISO 13485 quality management system certifications.

Kesheng’s published quality management process includes:

• Inspecting plastic sheets, molds, and adhesive materials before production;

• Monitoring heating temperature, vacuum pressure, and forming time;

• Checking for cracks, bubbles, deformation, and surface defects;

• Inspecting cutting dimensions, edge smoothness, and assembly performance;

• Conducting sealing, compression, and heat-resistance tests;

• Retaining quality inspection records for traceability and process improvement.

Suitable Procurement Projects:

• International buyers seeking a custom blister packaging manufacturer in China;

• Custom thermoformed packaging for food, medical, cosmetics, and industrial products;

• Projects requiring support from structural consultation and sampling through mass production;

• Custom packaging requiring PET, PP, PS, or other material options;

• Medical device packaging projects requiring cleanroom production and quality management support.

Key Strength: A broad application range combined with custom manufacturing, documented quality control procedures, medical packaging production conditions, and multiple material options.

2. TOPPAN Packaging

Main Markets: Food, retail consumer products, medical devices, and sterile packaging.

TOPPAN Packaging provides clamshell packaging, custom blister packaging, thermoformed food containers, medical trays, sterile packaging, and compatible lidding solutions.

The company completed its acquisition of Sonoco’s thermoformed and flexible packaging business in 2025.

TOPPAN’s current thermoforming operations cover food, retail, and medical markets, including:

• Produce and egg clamshell packaging;

• Precision medical trays;

• Custom blister packaging;

• Sterile packaging solutions.

Its medical thermoforming operations also publicly present Class 8 cleanroom production, in-house tooling development, and quality systems associated with ISO 9001 and ISO 13485.

Suitable Procurement Projects:

• Large-volume, multi-region packaging procurement;

• Combined food, retail, and medical packaging programs;

• Projects requiring both thermoformed packaging and compatible lidding films;

• Medical device projects requiring cleanroom manufacturing.

Key Strength: Broad market coverage and the ability to provide thermoformed packaging solutions for food, retail, and medical applications.

3. Amcor

Main Markets: Food, fresh produce, pharmaceutical products, and medical devices.

Amcor publicly offers fresh fruit clamshell packaging as well as custom medical and pharmaceutical thermoformed trays.

Its fruit clamshell packaging uses an integrated lid-and-base structure with corner locks and ventilation features designed to protect and display fresh produce.

Amcor also manufactures custom thermoformed trays for pharmaceutical and medical device applications. These may include standard trays, hinged clamshell structures, and protective packaging components.

Suitable Procurement Projects:

• Fresh fruit and agricultural produce packaging;

• Medical device and pharmaceutical trays;

• Projects requiring the support of a large international packaging group.

Key Strength: Global packaging operations covering both food and medical thermoformed packaging.

4. Placon

Main Markets: Retail, food, and medical thermoformed packaging.

Placon provides both stock and custom clamshell packaging.

Its retail clamshell products use EcoStar® post-consumer recycled PET and may include reclosable snap locks, easy-open features, and hanging holes.

For food packaging, Placon also offers clear clamshell containers for bakery products, desserts, and other retail food applications.

Suitable Procurement Projects:

• Retail packaging for the US market;

• Clear clamshell packaging using PCR PET;

• Food, consumer product, and selected medical packaging projects;

• Buyers requiring both stock and custom solutions.

Key Strength: A mature thermoformed packaging product line with a strong focus on PET containing post-consumer recycled material.

5. Dordan Manufacturing

Main Markets: Medical devices, electronics, industrial components, and retail consumer products.

Dordan specializes in custom thermoformed packaging, including clamshells, blister packaging, and trays.

According to the company’s website, structural design, prototyping, CNC tooling, thermoforming, and quality control can all be completed in-house.

For medical packaging, Dordan provides Class 8 cleanroom production and presents ISO 13485 quality system capabilities, medical device cavity design, and sterilization compatibility evaluation.

Suitable Procurement Projects:

• Custom medical device clamshell packaging;

• Projects with demanding product retention, snap-lock, and hinge requirements;

• Electronics and antistatic packaging;

• Projects requiring in-house engineering and tooling development.

Key Strength: Strong engineering and internal tooling capabilities for structurally complex custom packaging.

6. Lacerta Group

Main Markets: Bakery, deli, fresh produce, and prepared food packaging.

Lacerta offers a variety of stock and custom food clamshell containers, including packaging for sandwiches, deli foods, bakery products, and ready-to-eat meals.

Its clamshell products use clear PET and may include Pop-Tight closure systems and easy-closing structures.

Lacerta states that its ReCERTA™ material contains an average minimum of 10% post-consumer recycled content. Its food packaging production system is also certified under the SQF food safety program.

Suitable Procurement Projects:

• Sandwich, bakery, deli, and ready-to-eat food packaging;

• Distributors requiring stock food packaging;

• Projects requiring PCR material and food safety management support.

Key Strength: A strong focus on food thermoforming, supported by a broad range of stock sizes and extensive food packaging experience.

7. Display Pack

Main Markets: Bakery, herbs, salads, fresh produce, and ready-to-eat food packaging.

Display Pack provides clear PET hinged food containers for herbs, salads, bakery products, deli foods, and grab-and-go applications.

Its herb and salad packaging uses transparent PET to improve product visibility and includes structures suitable for labels and hanging retail displays.

The company also offers clear hinged bakery containers and tamper-evident food packaging.

Suitable Procurement Projects:

• Bakery and fresh food packaging;

• Herb, salad, and small produce packaging;

• Projects requiring stock or custom food containers.

Key Strength: Broad food packaging coverage and experience with transparent display and tamper-evident structures.

8. VisiPak

Main Markets: Hardware, tools, craft products, retail goods, and general consumer products.

VisiPak’s primary strength is its selection of stock clamshell packaging.

According to its website, the company offers more than 200 stock plastic clamshell designs, including:

• Single-hinge clamshells;

• Box-style clamshells;

• Round clamshells;

• Double-sided clamshells;

• ClamTray structures.

In addition to stock products, VisiPak also provides custom packaging design, prototyping, and production services.

Suitable Procurement Projects:

• Small-volume orders that need to avoid tooling costs;

• Retail products with short launch timelines;

• Hardware, tool, and craft product packaging;

• Projects that may transition from stock packaging to a custom design.

Key Strength: A large selection of stock sizes that can reduce initial tooling investment and shorten procurement lead times.

9. Rohrer Corporation

Main Markets: Consumer goods, tools, cosmetics, electronics, and retail packaging.

Rohrer provides custom clamshell packaging and can design different sizes, shapes, support feet, and hanging holes according to the product and retail display requirements.

In addition to plastic clamshells, the company provides blister cards, printing, thermoforming, and packaging design services.

This makes Rohrer suitable for brands requiring combined plastic and printed paperboard packaging.

Suitable Procurement Projects:

• Projects combining clear clamshell packaging with printed cards;

• Retail tools, electronics, and consumer products;

• Projects requiring custom display structures and branded printing.

Key Strength: The ability to combine printed paperboard, blister packaging, and clamshell thermoforming.

10. Anchor Packaging

Main Markets: Foodservice takeout, bakery, deli, refrigerated foods, and ready-to-eat meals.

Anchor Packaging provides a wide range of one-piece hinged food containers.

Its Deli Clamshell range uses clear PET and leak-resistant perimeter closures for:

• Bakery products;

• Confectionery;

• Snacks;

• Deli foods;

• Refrigerated foods.

The company also offers microwaveable PP food packaging, rPET containers, and clamshell products designed for hot, cold, takeout, and delivery applications.

Suitable Procurement Projects:

• Foodservice takeout and prepared meals;

• Bakery, deli, and refrigerated foods;

• Projects requiring PET, rPET, or PP clamshell containers;

• Buyers requiring leak resistance and reliable closure performance during transportation.

Key Strength: A comprehensive food packaging range covering refrigerated, ambient, microwaveable, takeout, and delivery applications.

Stock Packaging vs. Custom Packaging: How to Choose

Stock Clamshell Packaging

Stock packaging does not require dedicated tooling and can generally shorten procurement lead times while reducing initial investment.

It is suitable when:

• The product is still being tested in the market;

• The order volume is relatively low;

• The product dimensions fit an existing standard container;

• The launch schedule is tight;

• Packaging uniqueness is not the primary requirement.

The main limitation of stock packaging is that size and shape choices are restricted. The product may not fit perfectly, and the packaging may offer limited opportunities for brand differentiation.

Custom Clamshell Packaging

Custom packaging can be designed around the exact product dimensions and intended use.

Customizable features may include:

• Product cavities;

• Snap locks;

• Hinges;

• Reinforcement ribs;

• Hanging holes;

• Labeling areas;

• Tamper-evident structures.

Custom packaging is suitable when:

• The product has an unusual shape;

• The product must be held securely in place;

• Transportation movement and damage must be reduced;

• A special retail display format is required;

• Branding or a unique structure is important;

• Order volume is sufficient to amortize tooling costs.

Decision Comparison

Compliance Issues in Food Clamshell Packaging Procurement

Food packaging compliance depends on the target market, food type, contact temperature, and intended use.

Buyers should confirm the following information with the supplier:

• Raw material name and grade;

• Food-contact material declaration;

• Applicable temperature range;

• Suitability for refrigeration, freezing, or heating;

• Suitability for acidic, oily, or high-moisture foods;

• Whether post-consumer recycled material is included;

• Which specific material and product are covered by the test report;

• Food safety management systems used by the manufacturing facility.

A package should not be considered suitable for direct food contact based only on its appearance or transparency.

Compliance Issues in Medical Packaging Procurement

Medical device packaging should be evaluated according to product risk, sterilization method, and regulatory market.

Buyers should verify:

• ISO 13485 quality management certification;

• Clean manufacturing areas and their classification;

• Compatibility between the material and sterilization method;

• Dimensional, particulate, and appearance controls;

• Batch traceability and inspection records;

• Packaging integrity and transportation validation requirements.

Possessing an ISO certification or cleanroom does not automatically mean that every product complies with every market requirement. Buyers must verify the certification scope and project-specific documentation.

Common Procurement Risks

Hinge Failure

The living hinge of a clamshell package can be affected by material thickness, forming temperature, structural design, and folding methods.

During sample testing, repeatedly open and close the package and inspect the hinge for whitening, cracking, or breakage.

Snap Locks That Are Too Loose or Too Tight

A loose snap lock may cause the package to open accidentally during transportation.

An overly tight lock may make the package difficult for consumers to open and may even cause the plastic to crack.

The closure structure should be designed according to material thickness, product weight, and intended use.

Poor Product Cavity Fit

If the cavity is too large, the product may move during transportation.

If the cavity is too small, assembly may become difficult or the product may be compressed.

Before beginning a custom project, buyers should provide accurate product dimensions, weight, and tolerance information.

Hidden Development Lead Times

The development timeline for custom packaging includes more than thermoforming production.

It may involve:

1. Confirming product information;

2. Structural design;

3. Tooling development;

4. Sample production;

5. Customer testing;

6. Tooling modification;

7. Material procurement;

8. Mass production.

The project schedule should include additional time for sample revisions and potential material delays.

Minimum Order Quantity Risks

Some quotations are valid only at relatively high production volumes.

During the RFQ stage, buyers should separately confirm:

• Sample costs;

• Tooling costs;

• Pilot-run minimum order quantity;

• Mass-production minimum order quantity;

• Tiered pricing at different volumes;

• Tooling ownership;

• Tooling storage period;

• Future tooling modification costs.

Conclusion

Selecting a clamshell packaging manufacturer should not be based only on which company is the largest or offers the lowest price. The more important question is whether the supplier is suitable for the specific project.

For food packaging, buyers should prioritize food-contact materials, sealing performance, and hygiene management.

For medical packaging, procurement teams should focus on clean manufacturing, ISO 13485 quality systems, and traceability.

For retail consumer goods, the main considerations may include product visibility, snap locks, hinge performance, tamper evidence, and integration with printed packaging components.

For buyers seeking a custom blister packaging supplier in China, Hangzhou Kesheng Packaging Material Co., Ltd. publicly presents food, medical, cosmetic, industrial, and consumer product packaging.

The company also presents custom manufacturing capabilities, documented quality inspection processes, ISO 9001 and ISO 13485 certifications, and clean manufacturing conditions for medical packaging.

It can therefore be considered a potential supplier for preliminary RFQs and sample evaluation.

FAQ

What Is the Difference Between Clamshell Packaging and Standard Blister Packaging?

Standard blister packaging usually combines a clear plastic blister with a printed backing card. The product is secured to the card through heat sealing, cold sealing, or another sealing method.

Clamshell packaging is usually a one-piece plastic structure with a hinge connecting the lid and base. It closes through snap locks, friction fit, or perimeter sealing.

Clamshell packaging generally provides more complete product enclosure and visibility from both sides. Carded blister packaging provides more space for printed branding and product information.

Does Custom Clamshell Packaging Require a Tooling Fee?

In most cases, yes.

Tooling costs depend on:

• Packaging size;

• Number of cavities;

• Structural complexity;

• Tooling material;

• Prototype method;

• Production equipment.

Buyers should not compare tooling prices alone. They should also confirm tooling life, ownership, modification costs, and whether the tooling can be reused for future orders.

Can rPET Clamshell Packaging Replace PVC Packaging?

In many clear retail and food packaging applications, rPET can be used as an alternative to PVC. However, the two materials should not be considered identical in every application.

The following factors may affect packaging performance:

• Forming temperature;

• Brittleness;

• Transparency;

• Sealing method;

• Percentage of recycled content;

• Product application;

• Distribution environment.

A new sample and closure test should be completed before changing materials.

How Can Buyers Determine Whether a Supplier Has Genuine Custom Manufacturing Capabilities?

Ask the supplier to explain its complete development process and provide information about:

• How the packaging is designed around the product;

• Which software is used for structural design;

• Where the tooling is developed;

• Whether prototype samples are available;

• How long sample revisions take;

• How snap locks and hinges are tested;

• How mass-production quality is recorded;

• Whether similar application examples are available.

A company that sells stock packaging does not necessarily have complete custom engineering capabilities.

Which Documents Should Buyers Review When Selecting a Food Clamshell Packaging Supplier?

Depending on the target market and intended application, buyers should review:

• Food-contact material declarations;

• Raw material information;

• Migration or safety test reports;

• Applicable temperature statements;

• Food safety management system documentation;

• Batch traceability records;

• Supplier quality control procedures.

The exact documentation requirements should be determined according to the target market, food type, and final use conditions.