Review on 🚲 Polar Bottle Breakaway Insulated Bike Water Bottle: BPA Free, Ultimate Cycling & Sports Squeeze Bottle by Allen Hart

At this time of year I often ride when it's over 35°C in the morning and 33-35°C in the afternoon. I fill 24-ounce bottles completely with ice, then add half a bottle of sports drink (homemade or commercial) to each bottle. The rest is filled up with filtered water. For anything over 1.5 to 2 hours, I carry a third 20-ounce bottle in my jersey pocket, the same mix of water, ice, and sports drinks. Often the ice is still there after 1-1.5 hours and the contents stay cool even after 2-2.5 hours. Ice. Even each bottle marked, one completely drunk before starting the next. Result: The ice melted faster in the untouched bottle(s) than if you drank a little from each bottle first. Some endothermic process is likely to be slowed down. :)