The Silicone Boot for Owala 30oz & 40oz FreeSip Sway 40 Ounces in classic pink is a branded accessory designed specifically for your Owala flask. Made of durable silicone, this boot stretches to securely fit your flask's capacity, ensuring a snug and leak-proof seal. The vibrant classic pink color adds a stylish touch to your drinkware, making it both functional and fashionable for on-the-go use. Perfect for keeping your beverages insulated and organized while you're out and about.