Specifications: Size: 10 inches Material: 100 food-grade silicone Compatible with: Stanley cup straws Package includes: 5 replaceable straw bite valves Features: safe, durable, reusable, odor-free, high temperature resistant, easy to carry and clean?Package Includes: 5 straw bite valves in different colors, which are perfect accessories for Stanley cups and perfect gifts to share with family and friends. ?Easy to Identify: The exquisite and stylish straw bite valve can stand out in various occasions and is easy to identify. ?Compatible with: 40oz 30oz 20oz 14oz Stanley cup straws. ?More convenient: With our straw bite valve, you don't need to look down to find a straw when drinking water, suitable for driving or working. ?High Quality: The straw bite valve is made of food grade silicone, BPA-free, safe and durable.