PREMIUM QUALITY and SAFE MATERIAL: The collapsible silicone lunch box is made of high-quality food-grade BPA free silicone, that is non-toxic, tasteless, odorless meets FDA standards, with airtight plastic lids, is 100 percent safe for adult and kids. And these foldable Food Storage Containers are microwave safe, freezer safe and dishwasher safe. SET OF SILICONE FOOD CONTAINERS: The 4 pack collapsible food storage containers contains capacity size 1200ml or 800ml or 500ml or 350ml, our foldable containers fit for different needs or people. Perfect for kid's lunch boxes, leftovers, take out or as a meal prep container. These silicone food containers will make sure your cereal, fruits, vegetables and other favorite foods stay fresh. CONVENIENCE AND SAVE SPACE: Our silicone food storage can be folded into 1 or 3 of its original size, saving 60 percent of space, can help you to save your kitchen cabinet space and keeps your cabinet in organize which is convenient for compact storage and organization. Comparing with heavy glass containers, those space savers are light weighted and easy to carry. These collapsible bowls are ideal for camping storage containers. MUlTIFUNCTIONAL SILICONE BOWLS: Our foldable silicone bowls are safe and environmentally friendly, which adapt to various condition. Perfect for storing cereal, fruits, vegetables, leftovers lunch box for kids or office workers, dish storage, camping storage, kitchen containers,bacon container and so on. Collapsible storage containers are designed with snap on clear locking lids with an air vent for convenient microwave heating. MICROWAVE and FREEZER and DISHWASHER SAFE: It's dishwasher, freezer and microwave safe. Microwavable for when you need to warm your meal. Dishwasher safe for hassle-free cleaning. Freezer safe for conveniently storing leftovers. The temperature tolerance of the leftover container is approximately -4F-428F or -20C-220C. TIPS: It must PULL UP the AIR VENT VALVE on the lid or REMOVE THE PLUG before HEATING!!!