Klean Kanteen's flask keeps water cold the longest at 75 hours. Stanley Legendary vacuum insulated water bottle clocks in at 34 hours, and Coleman Freeflow Autoseal comes in at 31 hours. Meanwhile MIRA, Polar Bottle, Swig Savvy, Geysa, CamelBak, and Hydro Flask all keep water cold for 24 hours.
Both Yeti and Hydro Flask are made with high-quality 18/8 stainless steel. Yeti does not claim hot or cold times, while Hydro Flask keeps your drink cold for 24 hours or hot for 12 hours. Both have a similar shape, so it’s down to your preference.
Bottles made from non-toxic 18/8 stainless steel are the healthiest options.
Vacuum insulated water bottles last from 6-31 hours cold and 1-20 hours hot.
MIRA for aesthetics, and Stanley, YETI, or Geysa for adventure.