1.[SAFE, STRONG, DURABLE] Our collapsible storage containers sets with airtight Lids adopts high quality high-grade silica gel, vacuum sealing, no BPA, non-toxic, tasteless, better cracking or degradation than plastic materials. Save your money and protect the environment. This package is the perfect solution for food storage in different kitchens and rv storage and organization. Can be used as an rv accessories for inside. 2.[MICROWAVE, FRIDGE, FREEZER & DISHWASHER SAFE] Keep the temperature at - 20 ℃ to 200 ℃ there is no need to replace the flat box stacks container. Leftovers? Just pour the rest of the food into the collapsible food storage containers and put it in the fridge again. No wasted space, no extra containers, no extra washing. 3.[VALUE PACK]4 Silicone folding bowl sets, including elegant, fashionable, compressible, stackable, reusable. These silicone food storage containers work well as far as regards sealing, and they collapse easily. A nice selection of sizes which are a lot easier to store than the glass style, each size: small (350 ml), medium (500 ml), large (800 ml) and extra large (1200 ml). 4.[CONVENIENT DESIGN]Our snap on lid of collapsible food storage can form an airtight vacuum seal, which can ensure your food is and reliable, and keep fresh for a longer time. Equipped with a vent for microwave heating and four convenient sizes, it is ideal for preparing meals or lunch boxes. Leak proof design makes it very suitable for indoor and outdoor food storage, work, camping, hiking, travel, etc.