High QUALITY AND PERFECT SEAL: All Silicone lids have 6 various sizes, using PREMIUM silicone material and getting THICKER GROVES on the edges providing a maximum seal. These are smooth and stretchy enough to snuggle over odd-shaped containers to prevent spilling and keep food fresh.It will not been slip easily when the container is wet or high heat. 
EXCELLENT USAGE: They can expand to fit many containers: such as a bowl, cups, glassware, pyrex, jar, food can, instant pot, crockpots. Suitable for FRUITS and VEGETABLES: watermelon, pineapple, cantaloupe, lemon, onions or other fruits and vegetables
SAFE AND HEALTHY: Food-grade silicone material, non-toxic, BPA free, 100% Phthalate Free, Lead Free, Plastic Free. Dishwasher and Microwave safe. NO discoloration & No deformation, heat resistant up to 450 F. Simply cover your food and heat in microwave or freeze. Safe and healthy for adult and Baby food storage
FREEZABLE AND MICROWAVABLE: They are anti freezing and heat resisting. WITHSTAND TEMPERATURE RANGE: -40 C (-40 F) to 232 C (450 F). Approved Dishwasher, Microwave and Freezer safe so you can enjoy delicious leftovers conveniently
STRETCHY SIZE AND COLORS: Super stretchable 6 sizes(2.5", 3.7", 4.5", 5.7", 6.5" and 8.1"). There's always one that fits. The newest white lids with small holes and the blue lids are the perfect helper for you and your families!