HydroFlash 21oz Narrow Mouth

Our water bottles were developed to perform in every environment. Each Hydro Flask is cast from double wall vacuum insulated food grade 18/8 stainless steel, therefore they are BPA-Free and resistant to bacteria and odors. The double wall vacuum insulation technology allows Hydro Flasks to keep contents hot for 12 hours and cold for 24 hours. The narrow mouth bottle is our original mouth size. It is ideal for keeping your liquids chilled all day. Ice cubes from standard refrigerator ice dispensers fit perfectly through the narrow mouth. Our patent-pending double-wall vacuum insulation means that the temperature outside a Hydro Flask® has a very hard time affecting the temperature of whatever you might put in it. The best part is that this is a two-way street; whether you’ve got hot or chilled liquids inside of your Hydro Flask®, the internal temperature won’t affect the temperature of the container in your hand. That means no blistered fingers with your daily cup of Joe, and no troublesome sweat rings—from your bottle of ice water. Hydro Flasks® are pretty amazing, but we can’t make guarantees about individual personal hygiene practices! Features: Narrow Mouth lifetime warranty Double Wall Vacuum Insulated Keeps Hot 12 Hours Keeps Cold 24 Hours BPA-Free 18/8 Stainless Steel Signature Matte Finish Lifetime Warranty Part # HF21