Pactiv Evergreen Foam Trays, Supermarket, #17, 8-5/16" x 4-13/16" x 5/8", White, Pack Of 1,000 Trays Help keep foods on display with these Pactiv Evergreen Foam Trays. The trays are made of lightweight yet durable foam and are able to withstand heated displays, refrigerators and blast freezers.