【Enhanced Protection】This protective sleeve offers enhanced protection for your water bottle. Its silicone boot helps reduce scratches and dents if the bottle is accidentally dropped. The bottom bumper for Hydro Flask not only minimizes noise but also helps maintain the bottle's appearance. 【Perfect Fit】 This silicone boot with a hole is compatible with Hydro Flask 32oz, 40oz cups, as well as Owala FreeSip 32oz and 40oz models. It also fits other water bottles with a base diameter of 3.4-3.6 inches. Please refer to the reference picture before purchasing to ensure a perfect fit for your bottle. 【Safe & Durable Material】 Made of stretchy, food-grade silicone, these protector boots are BPA-free, odor-free, reusable, and dishwasher safe, making them an excellent choice for everyday use due to their lightweight and flexibility. 【3-Pack for Easy Use】For a seamless fit, simply clean and dry your bottle's base. The clever drain hole allows air circulation for easy installation and removal. 【Wide Application】Designed for all-around protection, this silicone boot is your perfect guard for the gym, travel, outdoor runs, and even use at home. We are committed to your satisfaction, so please contact us with any questions. Crafted from flexible, food-grade silicone, this 3-pack of protective bottle sleeves offers enhanced scratch and dent protection while reducing noise. The clever drain hole ensures easy installation and removal, and fits Hydro Flask (32oz, 40oz) and Owala FreeSip (32oz, 40oz) models, plus any bottle with a 3.4-3.6 inch base. Perfect for gym, travel, or daily use.