Keeps hot liquids hot and cold liquids cold. How do they know the difference?

The key to many of the virtues of Hydro Flask's zen lies in our patent pending, stainless steel, double wall insulated construction. By leaving a vacuum void between the interior and exterior walls of the bottles, liquids within are insulated from the elements without - hot or cold. Simple and extremely effective. Hot liquids stay steamy for 12 hours or more -even buried deep in glacial snow- while cold liquids stay refreshingly cool for at least 24 hours, long after the trail turns hot and dusty.

Every Hydro Flask product is 100% BPA-free. Our bottles are constructed from uncoated 18/8 stainless steel, so there is no danger of a liner getting scratched and releasing the toxic chemical BPA into your beverage. Consequently, your Hydro Flask bottle can keep hot liquids hot without the leaching chemicals that may occur with plastic bottles and aluminum bottles.

Pack it with ice cubes. Fill it with water. Set it on your mother’s beautifully lacquered coffee table without a coaster. She will protest vociferously – that is, until you explain how the double-walled insulation of the Hydro Flask will keep it from sweating and leaving those rings that would otherwise haunt her through many a sleepless night.

Hot beverages are supposed to warm you from the inside-out, not the other way around. Hydro Flask’s double wall insulated construction ensures your hot liquids stay warm until you need them, without your bottle turning into a hot potato.

We created a thicker membrane area between the two walls that will allow beverages to maintain their "hotness" for up to 12 hours and longer. Heat doesn’t get out; cold doesn’t creep in and, well- vice versa.

$19.95