Features: DESIGN: The slider can open and close,Hole cover allows direct sipping or use with a straw. PREFECT DESIGN: We have improved the seal ring. Good air tightness design keeps your beverage warm and cold longer. Sliding cover design can fix it in any position completely solving the problem of the old lid touching the nose. SAFE MATERIAL:Made of top food grade crystal clear AS plastic which is BPA free,Eco-friendly, Sturdy and durable & dishwasher safe. SPILL-PROOF: The leak-proof lid has a silicone gasket lining the edge to prevent splashing . An air hole on top of slider according airflow ergonomics which helps reducing splashing.This tumbler lid is designed for most tumblers or cups. When filling hot drinks or driving. Contoured sip hole allows for direct sipping or for use with a straw. Specifications: Material:Plastic Color:Transparent Size: Approx. 10 for cm/3.93 inches (30oz) Size: Approx. 9 for cm/3.54 inches（20oz） Note: 1.Please allow 0-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Other parts are not included. Thanks for your understanding. Package includes: 2 x Tumbler Lid DESIGN: The slider can open and close,Hole cover allows direct sipping or use with a straw. PREFECT DESIGN: We have improved the seal ring. Good air tightness design keeps your beverage warm and cold longer. Sliding cover design can fix it in any position completely solving the problem of the old lid touching the nose. SAFE MATERIAL:Made of top food grade crystal clear AS plastic which is BPA free,Eco-friendly, Sturdy and durable & dishwasher safe. SPILL-PROOF: The leak-proof lid has a silicone gasket lining the edge to prevent splashing . An air hole on top of slider according airflow ergonomics which helps reducing splashing.This tumbler lid is designed for most tumblers or cups. When filling hot drinks or driving. Contoured sip hole allows for direct sipping or for use with a straw.