Food Grade Silicone:The silicone stretch lids used food grade material, soft texture non-toxic, durable, dishwasher safe and leak proof to keep your food fresh! Keeps The Food Freshness:The sustainable way to keep food fresh and stored. Airtight lid to keep food fresh longer and prevent leaks. The lid and the rim of the pot should be dry only before installation. Silicone elastic cover is better than plastic wrap. Easy To Clean:Silicone covers are easy to clean after use. Just put them in the dishwasher or wash them by hand with soap in warm water. Recyclable:Made of high quality silicone, it is eco-friendly and can be used Many times. They can completely replace foil, plastic wraps. The silicone cap is resistant to high and low temperatures and can be used in refrigerators, microwave ovens and electric ovens at temperatures ranging from -40°C to +230°C. Very Practical:Silicone lids have 2 different shapes (square and round) and 6 different sizes; A total of 6 pieces per shape ,The