Description: Adopting food grade silicone material, this leak stopper is BPA free, soft, flexible, high temperature resistant, dishwasher safe, reusable, durable, not easy to deform and break. With soft texture and high toughness, this leak stopper is easy to install and ensures good seal to prevent water from flowing out. Made of high quality silicone material, it is flexible, wear-resistant and durable. The length of this product is 5cm. It is universal for 30oz, 40oz tumbler. A necessary accessory for tumbler to ensure good sealing. Item Name: Leak Stopper Material: Silicone Features: Food Grade, BPA Free, Universal Size Details: Length: 5cm/1.97" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 4 x Leak Stoppers 4 x Leak-proof Covers