Hearthstone Food Tray 2 lb – 250 per pkg. Hearthstone Food Trays – Hot or cold, spicy or sweet, Southern Champion Food Trays are a great and easy way to serve just about anything. The single-use trays are made of clay coated board and are offered in a wide range of sizes, all of which are microwaveable. In addition, food trays are recyclable and compostable where facilities exist. Southern Champion Tray manufactures paperboard packaging products.