... 4.Microwave&freezer safe 5.Non-toxic,eco-friendly 6" biodegradable disposable corn starch hamburger box Item No.: HY-C ... sizes, shapes and uses are available5. Feature: 100% biodegradable&compostable, eco-friendly. 6. BPI, FDA, SGS and ISO14855 certified 7. ... service offered, design service offered, buyer label offered. 100% biodegradable, composable.30 days 85% degradation, 60 days 93% degradation, ...