Silicone Stretch Lids (Transparent) -Pack of 6 Material: food grade silicone, environmentally-friendly. Microwave-safe and heat-resistant to 450 c.so you can quickly reheat and enjoy delicious leftoversNon-toxic, bpa-proof leak proof, air-tight seal food cover wraps keep your food, fruit and vegetable fresh longer and away from fliesThe stretch lids create a tight seal when placed over a container to maximize the time your food stays fresh without letting air insideMulti size: totally 6 pieces per set: 2.6inch, 3.8inch, 4.5inch, 5.7inch, 6.5inch, and 8.3inch. They are ideal for storing leftovers, taking dishes, unfinished drinks or any leftover fruits and vegetablesDurable and easy to clean: just place them in the dishwasher or hand wash with soap in warm water after each use