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.
Here's what other sites are saying:
The Narrow Mouth bottle is our original mouth size. It is ideal for keeping your liquids chilled all day or warm well into the evening. Ice cubes from standard refrigerator ice dispensers fit perfectly through the Narrow Mouth. Our water bottles were developed to perform in every environment. Each Hydro Flask is hand cast from double wall vacuum insulated food grade 18/8 stainless steel, therefore they are BPA-Free and resistant to bacteria and odors. Our double wall vacuum insulation technology allows Hydro Flasks to keep contents hot for 12 hours and cold for 24 hours. Patented Narrow Mouth. Double Wall Vacuum Insulated. Keeps Hot 12 Hours. Keeps Cold 24 Hours. BPA-Free. 18/8 Stainless Steel. Lifetime Warranty. Model: 18 oz. / 532 ml. Mouth Size: Narrow. Mouth Width: 1.44 in / 3.7 cm. Bottle Weight: 9.7 oz. / 275 g. Bottle Height: 7.94 in / 20.2 cm. Bottle Height with Cap: 9.44 in / 24 cm. Bottle Circumference: 9.18 in / 23.3 cm. Bottle Diameter: 2.87 in / 7.3 cm. Available Color(s): Everest Blue, Black Butte, Orange Zest, Acai Purple
- Tahoe Mountain Sports
The Hydro Flask 10oz Water Bottle ensures that ample hydration remains close-at-hand. Made with food-grade 18/8 stainless steel, this bottle won't carry around a stank after months of use, and the small-ish size means it fits nicely in your car cup holder. Most importantly, this double-wall vacuum insulated flask keeps cold items cold for at least 24 hours, and hot items hot for twelve.
The popular 18 fl. oz. insulated water bottle is one of the original Hydro Flask products produced, and stows easily in your bag, purse or pack.
Hydro Flask 18oz Narrow Mouth Bottle FEATURES of the Hydro Flask 18oz Narrow Mouth Bottle Small (Narrow Mouth) opening Double Wall Vacuum Insulated Keeps Hot up to 12 Hours Keeps Cold up to 24 Hours BPA-Free
18 fluid ounces
Double Wall Insulated
18/8 Stainless Steel