😊SMART DESIGN - 2pcs in one package, try our different designs/colors, mix and match to create a new looking for your expensive Stanley flask. Warning: silicone boot only, flask water bottle is excluded. 🌟Snug fitting--Our Silicone boot was designed for Stanley Adventure Quencher 40oz and Stanley IceFlow 20oz 30oz Tumblers (Boot Size: 2.83inch bottom diameter, 1.89 inch high). Note: this flask sleeve is also ok for Hydro flask Wide Mouth (12oz/16oz/18oz/20/24 oz), Hydro Standard Mouth (18oz/21oz/24 oz), Owala flask Freesip & Flip 24oz and more brands flask with bottom diameter 2.83--2.95inch 🌟BPA FREE - Made of high quality food grade and soft silicone material, BPA free, non-toxic. It is a bit stretchable, easy to put on and take off 😊PORTABLE TO CARRY – Reusable, washable and foldable. Our sleeve can withstand stretching, folding, and anything life throws at it. 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.