Silicone Boot for Stanley 40 oz Tumbler-Matte Luster Protective Silicone Sleeve Fit for Stanley Cup with 2.8-3'' Bottom, BPA Free COMPATIBILITY：Fit for tumbler and bottle with a bottom diameter between 2.85-2.93 in. Such as fit for Stanley Quencher 40oz & 30oz tumbler H2.0, Stanley lceFlow 20oz & 30oz tumblers. Also fits Hydro Flask Wide Mouth bottle 12oz-24 oz. Simple Modern 40oz with handle, BEAST tumbler 30oz & 40oz. Please measure the diameter of the bottom of your bottle before purchasing. OVERALL PROTECTION: Expensive water bottles and tumblers should be carefully protected. Our durable silicone boot prevents cups from getting scratched, helps you avoid daily wear and tear on the bottom of the bottle, and extends the life of your water bottle. It also provides extra friction on the bottom and the bottle won't tip over easily. BE DIFFERENT: A blinged out look shows off your unique style better than a plain boot! We have many styles and colors for you to choose from, match it with your favorite water bottle and add a fashionable color to the trip! TOP QUALITY: Made of food grade silicone, BPA free, safe for children and. Firm fit, repeated use many times will not be deformed, is the perfect stainless steel water bottle accessories. HIGH QUALITY AFTER-SALES: If you have any questions about the silicone sleeve you purchased, please contact us at the first time, we will give a satisfactory solution at the first time.