SAYRU® 6x6x3″ compostable fiber burger clamshells deliver the structural strength your kitchen demands without the environmental cost of plastic or Styrofoam. Molded from surplus sugarcane and agricultural fibers — annually renewable plant-based materials — these unbleached clamshells are certified compostable in both home and industrial settings and contain no added PFAS. Each SAYRU® compostable fiber burger clamshell measures 6.4″ × 6″ × 3.2″, handles foods up to 200°F, and breaks down in just 1–3 months at a commercial composting facility — giving foodservice operators a turnkey solution for plastic-ban compliance and genuine sustainability.

Why Operators Are Making the Switch

Zero Added PFAS — Stay Ahead of Regulations

Per- and polyfluoroalkyl substances (PFAS) are facing rapid bans across U.S. states and international markets. These compostable fiber burger clamshells are manufactured with no added PFAS, so your operation stays compliant with current and upcoming packaging legislation without having to scramble for last-minute substitutes. For foodservice directors, purchasing managers, and franchise owners, that means one less compliance headache and zero risk of pulling non-conforming inventory off the shelf.

Grease & Cut Resistant — No Liner Required

Juicy burgers, saucy sliders, and loaded sandwiches push conventional containers to their limits. SAYRU® fiber clamshells are inherently grease and cut resistant, so grease stays inside the box — not on your customer’s hands, car seat, or delivery bag. This built-in performance eliminates the need for separate wax or plastic liners, reducing your per-unit packing cost and simplifying your prep line.

Microwave & Freezer Safe — One Container, Full Temperature Range

Most single-use containers force you to choose: heat or cold, not both. This compostable clamshell handles both extremes. It is rated microwave, oven, and freezer safe with a working temperature up to 200°F, making it equally reliable for flash-frozen meal prep storage and quick microwave reheats at the point of service. That versatility means fewer SKUs in your storeroom and a smoother workflow from kitchen to customer.

Certified Home & Industrial Compostable — Maximum End-of-Life Flexibility

Dual compostability certification means these clamshells break down in commercial composting systems within 1–3 months and also qualify for home-compost environments. This rare dual certification — verified by TÜV AUSTRIA for both OK compost HOME and OK compost INDUSTRIAL — gives your customers and waste-hauling partners the widest possible disposal pathway, which translates directly into higher diversion rates and stronger sustainability reporting metrics for your brand.

Plant-Based, Unbleached Fiber — A Natural Look Customers Trust

Made from surplus sugarcane and agricultural fibers, these clamshells carry an honest, unbleached natural appearance that visually signals sustainability to environmentally conscious diners. The material is USDA Certified Biobased, meaning a verified percentage of its content comes from renewable biological sources rather than petroleum. For brands positioning themselves around transparency and clean operations, the material tells the story before a single word of marketing copy does.

Allergen Free — Safe for Every Guest

These containers are safe for consumers with gluten or soy allergies, removing a hidden liability that operators of school lunch programs, hospital cafeterias, and allergen-aware restaurants must constantly manage. Allergen-free packaging is one fewer variable your team needs to track during service.

Strong, Sturdy Construction — No Crush, No Collapse

Structural integrity matters during stacking, transport, and delivery. SAYRU® fiber burger clamshells are engineered to be strong and sturdy, resisting the crush and flex failures that plague thin-walled foam and low-grade paper alternatives. That rigidity protects food presentation — because a burger that arrives looking exactly the way it left the grill drives repeat orders and higher customer satisfaction scores.

Product Specifications

Specification	Detail
Product Type	Compostable Fiber Burger Box Clamshell
Product Dimensions	6.4″ × 6″ × 3.2″ (L × W × H)
Material	Unbleached plant-based fiber (surplus sugarcane & agricultural fibers)
Temperature Tolerance	Up to 200°F — microwave, oven, and freezer safe
Composting Timeframe	1–3 months in a commercial composting system
Quantity per Case	500
Cases per Pallet	42
Case Weight	24.30 lbs
Case Dimensions	13″ × 13″ × 21″ (H × W × D)
PFAS Status	No added PFAS
Allergen Status	Allergen free (gluten-free, soy-free)
Color / Finish	Natural unbleached

Certifications & Compliance You Can Verify

Every certification listed below is third-party verified — not a self-declared marketing claim. For procurement teams under audit pressure, this documentation trail simplifies vendor qualification and internal ESG reporting.

• OK compost HOME — TÜV AUSTRIA: Confirms the product breaks down in lower-temperature home composting environments, meeting the European standard for backyard composting. This is one of the most stringent home-compostability certifications available globally.
• OK compost INDUSTRIAL — TÜV AUSTRIA: Validates disintegration and biodegradation under controlled commercial composting conditions. Facilities accepting this certification can process the packaging alongside food waste with full confidence in timeline and residue standards.
• USDA Certified Biobased Product: The U.S. Department of Agriculture has verified that this product contains a documented percentage of renewable biological ingredients, supporting federal and state biobased purchasing mandates.
• ASTM D-6400 Compliance: Meets the leading American standard for compostability of plastics and fiber products in municipal and industrial composting facilities — the benchmark most U.S. composters require before accepting packaging.
• FDA Compliant for Food Contact: Conforms to FDA guidelines for direct food use, ensuring material safety when in contact with hot, cold, wet, and greasy foods.
• NSF Certified Compostable: NSF International — an independent public health organization — has certified this product as commercially compostable, providing an additional layer of third-party validation recognized across North American waste infrastructure.

Where These Clamshells Work Hardest

A 6x6x3″ compostable fiber burger clamshell is one of the most versatile formats in foodservice packaging. Below is a breakdown of specific industries and scenarios where this product solves real operational problems — organized so you can find your use case fast.

Quick-Service & Fast-Casual Restaurants

High-volume burger and sandwich restaurants burn through thousands of clamshells per week. Grease-resistant compostable fiber clamshells eliminate the soggy-bottom failures common with basic paperboard, protecting brand presentation during dine-in, drive-through, and third-party delivery. The 6×6 footprint is purpose-built for single burgers, crispy chicken sandwiches, and breakfast sandwiches without excessive empty space that lets food slide during transit.

Food Trucks & Street Food Vendors

Space is tight and inventory variety is limited on a truck. A container that is microwave safe, freezer safe, grease resistant, and compostable replaces two or three single-purpose SKUs. Sturdy construction withstands the jostling of mobile service, and the compostable claim resonates with festival-goers and farmers’ market shoppers who actively seek out sustainable vendors.

Catering Companies & Event Caterers

Large-format events — weddings, corporate galas, outdoor fundraisers — generate enormous single-use waste. Compostable clamshells let event organizers route all food packaging into compost streams rather than landfill, often a contractual requirement at municipal venues and university campuses. The allergen-free composition removes a risk factor when serving diverse groups with unknown dietary restrictions.

Corporate Cafeterias & Co-Working Space Pantries

Workplace dining programs are under increasing pressure from internal sustainability committees and ESG reporting requirements. Switching to certified-compostable, PFAS-free clamshells is one of the highest-visibility, lowest-disruption changes a facilities team can make. Dual home/industrial compostability means employees can even compost the container at home if the office does not yet have commercial composting service.

School Lunch Programs & University Dining

Allergen-free, FDA-compliant, and free of added PFAS — these three attributes address the top packaging concerns for K-12 and university food directors. The burger-box format fits standard cafeteria portioning, and compostability supports the zero-waste pledges increasingly adopted by school districts and higher-education institutions.

Hospital & Healthcare Food Services

Patient meal trays require packaging that is safe for microwave reheating, free of common allergens, and compliant with strict food-contact regulations. These clamshells check every box while offering an end-of-life composting pathway that supports healthcare sustainability mandates.

Ghost Kitchens & Virtual Brands

Delivery-only kitchens live or die on packaging performance during transit. Grease and cut resistance protects food quality over 20–40 minute delivery windows, while the sturdy fiber construction prevents the collapse and steam-warping that undermine unboxing experience and trigger refund requests. Compostable credentials also differentiate virtual brands in crowded delivery-app marketplaces.

Airline & Transit Catering

Weight matters at altitude, and compostable fiber is significantly lighter than rigid plastic alternatives. Freezer-safe construction supports pre-assembly workflows where meals are frozen, stored, and reheated before service. Compostability simplifies cabin-waste sorting for carriers pursuing waste-diversion targets.

Grocery Delis & Prepared-Food Counters

Supermarket delis packaging hot sandwiches, sliders, and grab-and-go burgers need a container that tolerates both heat-lamp display and customer reheating. A 200°F temperature rating handles the heat lamp; microwave safety handles the customer’s kitchen. No added PFAS satisfies the growing retailer mandates from major grocery chains eliminating PFAS from private-label and deli packaging.

Meal Kit Delivery & Meal Prep Services

Frozen meal-prep services need packaging that transitions directly from freezer to microwave. This clamshell does exactly that. The compostable claim is a powerful differentiator for subscription meal brands marketing to health-conscious, eco-aware consumers who scrutinize every component of their delivery for sustainability.

Hotel Room Service & Resort Dining

Branded sustainability is a competitive advantage in hospitality. Compostable clamshells for in-room dining and poolside service align with green-hotel certification programs and guest expectations at eco-resorts. The natural unbleached finish communicates environmental commitment at the moment of meal delivery.

Stadium & Arena Concessions

High-traffic venues move thousands of burgers per event. Compostable packaging supports venue-wide composting programs that are now standard at major sports and entertainment complexes. Sturdy, grease-resistant clamshells survive being carried up stadium stairs, stacked on narrow tray tables, and balanced on laps — all while keeping sauce off jerseys.

Farmers’ Markets & Outdoor Festivals

Vendors at farmers’ markets and eco-conscious festivals often face packaging requirements that mandate compostable materials. A home-compostable clamshell exceeds those requirements and sends a visible sustainability signal to the environmentally motivated shoppers who dominate these venues.

Compostable Fiber vs. Traditional Plastic & Styrofoam

The competitor page explicitly positions this product as a sustainable replacement for plastic and Styrofoam. Here is how the comparison breaks down across the metrics that matter most to foodservice operators.

Attribute	SAYRU® Compostable Fiber Clamshell	Traditional Plastic / Styrofoam
Raw Material	Surplus sugarcane & agricultural fibers (renewable, plant-based)	Petroleum-based polymers (non-renewable)
PFAS Content	No added PFAS	Often contains PFAS or other chemical coatings
End-of-Life	Composts in 1–3 months (commercial); also home compostable	Persists in landfill for hundreds of years
Microwave Safe	Yes — rated up to 200°F	Styrofoam: No. Many plastics: limited or unsafe
Freezer Safe	Yes	Varies by plastic type; Styrofoam can crack
Grease Resistance	Built-in, no liner needed	Requires chemical coatings or separate liners
Regulatory Risk	Compliant with single-use plastic bans and PFAS regulations	Subject to expanding bans in 15+ U.S. states and the EU
Certifications	TÜV AUSTRIA (HOME + INDUSTRIAL), USDA Biobased, ASTM D-6400, NSF, FDA	Typically none for compostability
Consumer Perception	Strong positive signal for eco-conscious diners	Increasingly viewed as environmentally irresponsible

Frequently Asked Questions

Are these compostable burger clamshells microwave safe?

Yes. These fiber burger clamshells are rated microwave and oven safe for foods up to 200°F. That makes them suitable for reheating burgers, sandwiches, and hot entrées directly in the container without transferring to a separate dish.

Do these clamshells contain PFAS?

No. These containers are manufactured with no added PFAS (per- and polyfluoroalkyl substances), helping your operation comply with state-level PFAS bans in food packaging and meeting the requirements of commercial composting facilities that reject PFAS-containing materials.

What certifications do these compostable clamshells carry?

They hold six key certifications: OK compost HOME and OK compost INDUSTRIAL from TÜV AUSTRIA, USDA Certified Biobased Product status, ASTM D-6400 compliance, FDA food-contact conformance, and NSF Certified Compostable status. This is one of the most comprehensively certified compostable burger clamshells on the market.

Can I use these containers in a freezer?

Yes. These clamshells are freezer safe, making them well suited for frozen meal prep, make-ahead sandwich programs, and any workflow that requires cold storage before service or delivery.

How long does it take for these clamshells to compost?

In a commercial composting system, these containers break down within 1–3 months. They are also certified for home composting environments, though home composting timelines can vary depending on conditions such as temperature, moisture, and aeration.

What material are these burger boxes made from?

They are molded from unbleached plant-based fiber derived from surplus sugarcane and agricultural fibers. These are annually renewable resources, and the finished product carries USDA Certified Biobased status confirming its renewable content.

Are these containers safe for people with food allergies?

Yes. The containers are allergen free — specifically verified as safe for consumers with gluten or soy allergies. This makes them appropriate for school cafeterias, hospital food services, and any operation that must minimize allergen cross-contact risks from packaging.

Will these clamshells hold up against greasy foods?

Yes. The fiber material is inherently grease and cut resistant without requiring a separate wax or plastic lining. This means juicy burgers, sauced sandwiches, and oily sides stay contained — no grease bleed-through to bags, trays, or customer hands.

How many clamshells come in a case and how many cases fit on a pallet?

Each case contains 500 clamshells and weighs 24.30 lbs. A standard pallet holds 42 cases, totaling 21,000 units per pallet — ideal for high-volume operations and bulk purchasing.

Do these meet single-use plastic ban requirements?

Yes. As a plant-based, compostable fiber product with no added PFAS, these clamshells comply with single-use plastic and Styrofoam bans now in effect across numerous U.S. states and municipalities. They meet ASTM D-6400 — the standard most commonly referenced in U.S. packaging legislation.