Hydro Flask® water bottles are developed to perform in every environment. Each bottle 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 narrow mouth bottle is Hydro Flask's 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.
Patented narrow mouth design
Narrow mouth opening is 1.44"
Double wall vacuum insulated
Keeps beverages hot for 12 hours
Keeps beverages cold 24 hours
Won't retain odors
Lightweight and durable
Signature matte finish
Fits in most car, bicycle, and stroller cup holders and bottle cages
Travis Rosbach was fed up with reusable beverage bottles that failed on every level, from plastics that leached harmful BPA to temperature fluctuations that would make Mercury ashamed. If the hot tea he put in them didn't scald his hands when he picked them up, then the ice-cold water he took to the beach made the bottles sweat and collect more sand than a sunbather's bikini bottom.
So Hydro Flask® began with a challenge: to create a reusable water bottle that truly performs in any environment. It had to keep hot liquids hot and cold liquids cold. Period. It should be BPA-free, lightweight, durable, sweat-proof, freeze-proof, recyclable, and come with an unconditional lifetime warranty.
The result of a year and a half of hard work and research is the beloved Hydro Flask. They are made from 18/8 stainless steel and feature double-wall vacuum insulation that ensures the temperature of the liquid inside never mingles with the temperature of the environment outside. Your hots will stay hot for 12 hours, and your colds will stay cold for 24.