Testing of disposable tableware products in restaurants
A leading Spanish restaurant chain, specializing in fast food and high-quality takeaway services, recently underwent comprehensive real-world testing of our biodegradable bamboo food packaging.
The client was looking for reliable alternatives to traditional plastic materials that met stringent European sustainability requirements while demonstrating excellent performance in challenging catering environments—including microwave heating, refrigeration, oil resistance, and oven use.
The evaluation focused on three core products:
- Bamboo Lunch Box
- Bamboo Bowl
- Disposable Bamboo Trays
Two material formulations were tested side-by-side for each product:
Material A: 100% bamboo bio-based compound, achieving 99.48% biodegradation within 175 days in natural soil conditions.
Material B: Bamboo bio-based compound blended with other degradable materials according to customer-specified ratios, achieving approximately 40% biodegradation.
Key performance claims of ZSS bamboo tableware include a temperature resistance range of -30°C to 130°C and full compostability under natural conditions.
Test Objectives
The Spanish client specifically evaluated:
- High-temperature oil leakage prevention
- Freeze/cold resistance and crack prevention
- Microwave heating duration and structural integrity
- Impact on food quality (taste, texture, freshness)
- Overall suitability for real catering workflows
Food Compositions Used in Testing
RThe client created the following combinations based on the restaurant's usage scenarios for testing:
![bamboo lunch box microwave and cold storage test]()
Disposable Bamboo Trays
Fresh food combination
Residual moisture 30%, starch, vinegar, oleic acid 0.2
![best biodegradable lunch box for microwave and fridge]()
Bamboo Bowl
Cooked food combination
Oleic acid 0.2, 30% sauce content
![Spanish restaurant tests compostable food packaging]()
Bamboo Lunch Box
Specially formulated for baking/roasting
Vegetables, fat, dairy protein, 35% moisture
Test Scenarios & Results
Scenario 1: 24-Hour Cold Storage at 5°C
All products (Lunch Box, Bowl, and Trays) in both Material A and Material B were filled with the respective food combinations and stored at 5°C for 24 hours.
Results:
Condensation was very well controlled.
Containers remained dry and showed no deformation.
Lid sealing performance was excellent; food was preserved in very good condition.
Test completed successfully √
Scenario 2: Microwave Heating at Maximum Power for 3 Minutes
Filled containers were heated in a microwave at the highest power setting for 3 minutes.
Results:
No deformation observed.
Food taste and texture remained unchanged.
Test completed successfully √
Scenario 3: Convection Oven Testing
![microwave safe takeaway packaging EU market]()
Bamboo Lunch Box (Material A):
Placed in a convection oven at 130°C.
→ The container melted and deformed.
→ Test failed ❌
![heat resistant biodegradable packaging real test]()
Bamboo Bowl (Material B):
Subjected to convection oven baking at 150°C.
→ The sample did not melt and showed no deformation.
→ Test completed successfully √
Understanding the Convection Oven Result
The failure of Material A Lunch Box at 130°C in a convection oven is an important and transparent finding.
Convection ovens apply dry, circulating hot air, which creates a more aggressive thermal environment than microwave heating (which primarily heats water molecules inside the food) or short-term hot-fill conditions. At the upper limit of the stated temperature range, prolonged exposure to dry heat can push high-biopolymer formulations beyond their practical limit.
Material A is optimized for maximum biodegradability (99.48%). Achieving such a high natural degradation rate involves a material structure that prioritizes environmental performance.
Material B, by incorporating additional degradable components at customer-specified ratios, gains extra thermal stability — successfully withstanding 150°C in the same type of oven.
This is not a product defect but a clear demonstration of the performance trade-off that responsible material design must manage.
ZSS openly shares these boundaries so customers can select the right formulation for their actual use case:
Material A → best for maximum biodegradability + microwave & cold-chain applications
Material B → preferred when higher dry-heat (oven) resistance is required
Key Takeaways for European Catering Brands
The Spanish client’s testing confirmed strong performance in the two most common takeaway scenarios — refrigerated storage and microwave reheating. Oil and moisture resistance were also reliable under realistic food conditions.
For operators who also need occasional convection-oven capability, Material B provides a practical solution while still remaining fully biodegradable and free of conventional plastics.
European foodservice companies face rising pressure from PPWR, plastic taxes, and consumer expectations. Choosing a manufacturer that controls its own bamboo bio-based technology — and that openly publishes real test data, including limitations — reduces risk and supports credible sustainability claims.
ZSS Technology continues to advance both the biodegradation rate and the thermal performance window of its bamboo compounds. We invite European chains, premium takeaway operators, and caterers to test Material A and Material B under their own kitchen conditions.
Request sample kits or discuss a customized formulation matched to your temperature profile and sustainability targets.
