To test the temperature, we placed five ice cubes in each bottle, filled them with filtered water, and let them sit on a counter at room temperature (73 degrees). We then evaluated the temperature one hour, five hours, and ten hours later: times that correspond with everyday use cases, like quick trips to the store, half-day errands, and a full day of activity.
All insulated water bottles claim to keep water cold (or hot) for 24 hours. That’s nice, but rather excessive. We just wanted to know if a bottle could last through a 10-hour day without the water temperature changing dramatically from its starting point. The contents of the Alpine bottle rose by 4.9 degrees Fahrenheit after 10 hours. This was in line with the other contenders in this price range, which included brands like Simple Modern, Iconiq, and Polar Bottle.
It wasn’t just the Alpine model’s insulation function that impressed us. Our parched testers particularly appreciated the fold-down metal handle, which is slightly reminiscent of the lid design of our $$ pick. Not only does the metal handle make the bottle easy to hook onto a carabiner or carry for extended periods of time, it also serves as leverage for twisting the cap on and off. The Mira Alpine also won because of its wide-mouth opening, which our testers clearly preferred, citing that they’re easier to load with ice and lemon slices.