Spill Stopper for Yeti: Spill proof kit comes with straw cover and circle gasket for Yeti straw lid hole to prevent leaking after setting up anti leaking stoppers for Yeti Straw lids Leak Proof Compatibility: Spill stoppers set compatible with Yeti straw mug 42 oz, 35 oz, 25 oz and with Yeti Rambler 26 oz to provide anti leak protection for Yeti Straw mug BPA Free Silicone Material: Silicone anti spill stopper is BPA free, reusable and easy to clean, made of soft silicone material that keeps your drink clean and simple Easy to Install and Portable: Anti leak stopper set for Yeti Straw Mugs is lightweight and portable, suitable for home, office, camping, hiking and outdoor activities Compatible with Standard Straws: Leak stopper accessories work with Yeti Mug Tumbler reusable straws measuring 10mm or 0.4 inches in diameter Dishwasher Safe Design: Spill stoppers are dishwasher safe for convenient cleaning and maintenance, ensuring long-lasting use with your Yeti drinkware Two Pack Value Set: Includes 2 packs of spill stoppers in black and clear colors, providing backup options and allowing you to share with family and friends