Keep the cup hygienic and clean: the silicone drinking glass lid sticks to the rim of the cup, is dust-proof and sealed, keeps flies away, keeps your drinking cups and coffee cups hygienic and clean. Stop spilling liquids even when the cup is tilted.Good seal: You can gently press into the middle and the lid creates airtight, waterproof and leak-proof seal, airtight and leak-proof, keeping your coffee or tea hot.High Quality: The silicone cup lids are made of high quality food grade silicone, non-toxic, no special smell, can be reused, not deformed, safe and durable.Easy to wash: The silicone cup lid is reusable and the soft material is easy to clean, and can be cleaned in the dishwasher or hand washed.