These foil carry-out containers hold food and provide more insulation than plastic or paper carry-out containers. They also keep foods such as salads from oxidizing or baked goods from going stale rapidly. When paired with a lid, these carry-out containers allow for food on the go, or store leftovers for later. Foil containers can be placed in pre-heated ovens to evenly warm and crisp leftover foods such as lasagnas, fries, and stews. Lids must be removed before reheating. Foil containers are not microwave-safe.