Caterers prepare foods ahead of time and transport them to the site, whether it is a banquet hall or outdoor picnic. During the storage and transportation phase, no matter how good the catering van’s suspension is, some jostling will occur. If your pans are not sealed tightly, the main dish can end up all over the floor. In order to keep the food in the pan, you will want a proper cover, like the Cambro Full Size Seal Cover (10PPSC). This cover is designed for full size Cambro pans and snaps onto the rim creating an air-tight, spill-proof seal.