Though Ingeo™ is made from plants, and not petroleum, our sushi trays and lids have a similar look and feel to traditional plastic and are also surprisingly sturdy. The tray and clear lid are sold together. Because our sushi trays and lids are made of Ingeo™, they: Are best used for foods below temperatures of 110°F. Need to be stores in a cool dry area away from direct sunlight. Even though they are as light and strong as plastic, they fully biodegrade when composted. Instead of using petroleum based plastics which create toxicity and environmental pollution, you can now use our compostable alternatives.