1.Food grade silicone and PP material, non-toxic and safe for use. 2.Breathable valve design lunch box. Safe to put in the microwave, dishwasher and freezer. 3.Perfect for indoor food storage, outdoor activity, such as work, camping, hiking, travel and more. 4.Each container is great to keep dry or wet foods like cereal, fruits, vegetables. ★ Made with collapsible silicone container and healthy PP material leak proof lid. The silicone and PP materials are both food grade and BPA free. Non-toxic, tasteless, odorless, non-stick and easy to clean without the health risks or environmental concerns. ★ Foldable design makes it easy to store and take with. Saving much more space when not in use. The lid is airtight and leak proof design. Snap-fit lid and sealing ring provide a tight seal. Perfect lunch box for fresh, yummy food，for indoor and outdoor use. ★ Our lunch boxes are washable, and it is very easy to clean. Microwave oven, refrigerator, dishwasher are all available and safe. Silicone can stand maximum temperature is 200℃, However for safety, recommended using temperature is 0℃ - 40 ℃. ★ Note: when heated in microwave oven, please must make sure to pull the air valve up. Or you can heat the container without lid in the microwave oven. Keep away from fire. ★ Three Size：S:4.92*3.54*2.55 Inch(12.5*9*6.5 cm)，M:6.29*3.93*2.55 Inch (16*10*6.5 cm) ，L:7.08*5.11*2.95 Inch(18*13*7.5 cm)