1. [Prepare and Store Meals]: Collapsible silicone food storage containers are ideal for food preparation and storage; 4-piece silicone food container set includes containers with diameters of 5, 5.8, 6.6, and 7.5 inches (12.7, 14.7, 16.8, and 19 cm); Coordinating colored lids have buckle latches for security 2. [Seal to Keep Fresh]: The silicone ring combined with the snap lid provides a vacuum seal to keep food fresh; Pull the round exhaust valve on the silicone folding container lid to reheat your meals 3. [Takes Up Minimal Space]: The collapsible silicone lunch box takes up minimal cabinet, counter, or zero space; prepare food and store leftovers in the silicone collapsible food container bowl to save cooking time later in the week and keep your meal plans on track. 4. [Extended Bowl]: From 1.1 or 1.3 inches (2.8 or 3.3 cm) foldable size, small silicone airtight container fully extends to 2.1 inches (5.3 cm), medium to 2.3 inches (5.8 cm), large to 2.5 inches (6.4 cm), extra large to 2.6 inches (6.6 cm)