ShoppoStreet Set of 6 Multi Size Silicone Stretch Lids Food Saver Microwave, Freezer Covers for Bowl, Can, Jar, Glassware | Safety Silicone Stretch Reusable Eco- Friendly Lids with Various Covers (Multicolor - As per Availability) Features:  Reusable Stretch to fit oval, square, round and rectangular containers Freezer, refrigerator & top rack dishwasher safe Reutilisables  How to use:  1. Keep the bowl or can dry  2. Take off the plastic of the cover  3. There are 2 surfaces totally, so please put the smooth surface down, and the rough surface upside  Please choose the corresponding size. Recommended to use smaller Bowl Cover to cover a larger container. Such as 30cm container use a 24cm plastic wrap to cover  Microwave: can be used at below 230 Fridge: can be used at above -40  Sharp nails in the use process will make has tensile strength of silicone plastic lids preservation is torn or damaged  Step1. Pick up the bowl cover, stretching to containers both sides, put the smooth surface down to cover the container  Step2. Please cover one side of the container and then stretch to the other side and then close contact with other side  Step3. Squeezing the excess air in the center of the plastic wrap, make silicone wrap better to cover the edge and squeeze out the bubble of edge