Standard Mouth Sport Cap Black;

Say hello to the first insulated Sport Cap designed specifically for your Standard Mouth Hydro Flask. Keep your drink colder even longer with The Hydro Flask Insulated Sport Cap. It works with any Standard Mouth Hydro Flask to provide the ideal solution for on-the-go hydration needs. Our unique internal valve eliminates the whistling associated with most sport caps, while the ergonomic design makes it comfortable to drink from and allows for one-handed open and close. Ideal for any outdoor adventure or just around town. Like all Hydro Flask caps, the Insulated Sport Cap is BPA-free and phthalate-free. This Hydro Flask product is backed by a manufacturer's lifetime warranty.