😊SMART DESIGN - 2pcs in one package, try different colors/designs for yourself, mix and match to create a bright new looking for your expensive Owala flask water bottles Warning: silicone boot only, flask water bottle is excluded. 🌟Tight fitting--Our Silicone boot was designed for 40oz stainless steel Owala FreeSip, Twist and Flip water bottles. It DOESN'T fit Owala and Stanley 40oz tumblers with handle (Boot Size: 3.56inch bottom diameter, 1.89 inch high). 🌟【Easy to Install and Remove】Our protective silicone boot for Owala was designed with a small hole at the bottom for air outlet, supper easy to install. If you like our desings and want to try on your other brand water bottle of Hydro, Stanley, Simple modern...... pls do check your flask BOTTOM diameter to ensur the right size choice. Our flask/tumbler boot is a bit stretchable to fit the BOTTOM diameter from 3.56in-3.65in 😊High quality you can trust– Made of food grade silicone materials, BPA free. Reusable, washable and foldable. Our sleeve can withstand stretching, folding, and anything life throws at it. 😊SATISFACTION GUARANTEED – Buy with confidence! You are assured to get the products as described and get the quick/easy customer service by writing or talking to us directly. Smart design:-Made of Anti-slip, BPA free silicone material -Stealth landing: Soft silicone bottom sleeve to prevent your bottle from bumps,dents and dings. -Special design to crate a new looking for your favourite flask SATISFACTION GUARANTEED:-Buy with confidence, 100% satisfaction or 100% money back with our easy/quick after-sale service support by writing or talking to us directly.