Item Function: 1. Boots snugly fits compatible cups and tumblers. Silicone bottom protector, lightweight, better protect the water cup, reduce noise, prevent scratches and avoid metal clank. 2. Fits great inside car cup holder after placing these silicone boots onto your cups and other compatible size water bottles. 3. Convenient to carry your beloved cups and water bottles anywhere. Great for outdoor and sports, office, home and travel. 4. Silicone boots, softer and more resilient, compared to other harder silicone covers, the bottom cover is made of pure silicone, well stabilize and gives extra protection to your cup bottom and other suitable water bottles base. Great choice of silicone boot cover for decoration and protection, easy to use, easy to clean, sturdy and last long. Specifications: Product Name: Drinkware Accessory, Color: Black, Material: Silicone, Size: 7.5x7.5x4.3cm / 2.95"x2.95"x1.69"(L*W*H), Package List: 1 Pc Drinkware Accessory.