Square fiber lids for 24-48 oz square fiber bowls are designed to keep your food secure in transit when you need it most. These lids are 100% compostable and will break down in a commercial composting facility in 2 to 4 months. When clear covers aren’t needed for grab n’ go cold cases, fiber lids make a great option. For hot foods, customers choose the fiber lid to hold up against the food’s heat inside the container.