Silicone Tops Are Round Yet Stretchy Enough To Fit Snugly Over Odd-Shaped Mugs, Pots, Bowls, And Containers. Leak-Proof with an Air-Tight Seal So Foods Stay Fresh and Tasty. You had better not completely seal container when you are using in Microwave or Oven, because the expanding heat and pressure from the container, may result in damage or injury. Perfect fresh food cover for barbecue outdoors or travel with your friends and the fresh food cover doesn't spill food and water in your car. Round Bowls, Square bowls, pots, plates, cans and containers of all shapes and sizes, Top On Stretch Silicone lids can cover them all. Top On lids are food safe and a great way to eliminate nasty and chemical-filled plastic wrap from your home. We are on Top On silicone Stretchy Lids keep food fresh, safe and secure. Specification: Name: Silicone Cover for Kitchen Food Material: Food Grade Silicone Type: Cookware Lid Advantage: Heat-Resistance Flexible Temperature: -40F to +450F (-40c to +230c) Size: 2.6", 3.5", 4.3", 5.5", 6.3", and 7.3" Packing Include: 6 x Set Safety Silicone Stretch Reusable Lids with Various Covers Step 1 Place half of the lid over one edge of the container. Start on the side closest to your body. Step 2 Stretch the other half of the lid away from you, inching your way around the bowl. Step 3 Stretch, and then press the top of the lid while pulling the tabs to create a vacuum seal. Step 4 Pull the sides to ensure a perfect fit.