【Healthy Material】 Made of non-toxic, food-grade BPA-free silicone, eco-friendly silicone stretch lids. Good seal: Good seal and good elasticity, keep food fresh in the freezer. This silicone case can be used in the dishwasher, microwave, oven and freezer. Note: For the best sealing, please keep the silicone stretch lid dry when using. 【Keep Food Fresh】 The sustainable way to keep food fresh and stored. Airtight closure keeps food fresher longer and protects it from leaking. Just before attaching both the lid and the rim of the jar should be dry. The silicone stretch lid is better than with plastic wrap. 【Multi-sizes for multi-function】: A total of 12 pieces per set (6 round + 6 rectangular), which can cover containers of different shapes and sizes, including: salad bowls, glass, glass, food, can, cans, Cups, juice caps, pots, pans, Watermelon, pineapple, melon or other fruits and vegetables. 【Reusable & amp; Easy to Clean】 Made of high quality silicone, soft texture, tear resistance,