? JB  Microwave Safe Silicone Stretch Lids reusable Flexible Covers for Rectangle, Round, Square Bowls, Dishes, Plates, Cans, Jars, Glassware and Mugs (Free Size) - Set of 6 ?? HOW TO USE Place half of the lids over one edge of the container.Start on the side closet to your body.Stretch the other half of the lid away from you,inching your way around the bowl.Stretch,then press the top of the lid while pulling the tabs to create a vacuum seal.Pull the sides to ensure a perfect fit. ?FLEXIBLE TO FIT DIFFERENT SIZE CONTAINERS2.6"(will stretch to 3.5")3.8"(will stretch to 5")4.5"(will stretch to 6")5.7"(will stretch to 8")6.5"(will stretch to 9")8.3"(will stretch to 11")? NO LEAKAGEIt provides no leakage in any bottle,jar etc.? FLEXIBILITYNano meter silicone high stretchExcellent Flexibility? SAFE FOR OVEN OR FRIDGEClean lids and keep them dry before the first use and after each use.Lids can be used in the microwave or oven, but are not suitable for placing on the gas or electricity directly for heating.You had better not completely seal container when you are using in Microwave or Oven, because the expanding heat and pressure from container, may result in damage or injury?USESSilicone stretch lid replaces plastic bag, reused after cleaning, save cost, safer, as we all know, great silicone cover brings you and your family health.? 100% Flexible silicone material, non-toxic, BPA-free, dishwasher-safeStretch lids are made of durable silicone which provide strongly stretchable to fit odd shape and size container, perfect For Rectangle, Round, Square Bowls, Dishes, Plates, Cans, Jars, Glassware & Mug