- Stanley Boot Compatibility : This silicone boot is designed to fit the bottom width of your bottle, measuring between 2.8 to 3 inches. It is compatible with 20-30 oz stainless steel water bottles and 40 oz tumblers. - Versatile Bottle Fit : Tailored for a range of popular brands, this boot accommodates the Stanley 20/30/40 oz Quencher H2.0 FlowState Tumblers, 20/30 oz IceFlow Tumblers, and 24 oz Iceflow Jug. It also fits Hydro Flask 21/24 oz Standard Mouth and 20 oz Wide Mouth bottles, as well as Simple Modern 20/24 oz Ascent, 20/28 oz Classic Tumblers, 16/24 oz Kona Travel Mugs, and 24 oz Rally Protein Shakers. - Durable Silicone Material : Made from high-quality silicone, this protective boot offers both durability and flexibility. It is designed to withstand everyday use while providing a secure grip. - Enhanced Protection : Features anti-slip and anti-fall technology that helps keep your bottle secure. The added boot provides an extra layer of protection against drops and spills, making it ideal for outdoor activities or everyday use. - Practical Applications : Use it at the gym to prevent slips while you hydrate, during outdoor adventures where drops are more likely, or at work to protect your important beverage from spills. This silicone boot is a practical addition to your drinkware, ensuring that you can enjoy your beverages without worrying about damage or spills.