7.5/9cm Silicone Cup CoverRubber Bottom Pad Anti Slip Protective Silicone Cover For 12-40oz Universal Cups Bottles

Silicone. Feature: 1. Before the first use, the sealing ring should be washed clean. 2. Wash the lid with a small amount of hot water or ice water do not use a steel ball to clean it), then discard it, and then refill with boiling water or ice water to ensure cleanliness and hygiene. 3. After each use, please clean it and keep it dry. 4. It should not be stored in a humid place for a long time to extend the life of the lid. 5. Do not approach the heat source, and do not hit it violently. 6, the entire set of insulation cups placed out of children's reach to avoid burns