NatureWorks PLA Sushi Tray These containers are made from NatureWorks PLA, a 100% corn-based resin that is fully compostable. Our NatureWorks PLA Food Trays have a black bottom and clear top. The bottom is made black by using soy ink and maintains its compostability. These trays are for cold and warm foods only and cannot be exposed to heat over 110F. These trays are designed to compost in a commercial facility in 45 to 60 days.
