The Thermos double wall water hydration bottle, model 2465, is likely the best flip top bottle on the market. Not only does this 18-ounce version store enough drink for plenty of thirst-quenching re hydration over an hour-long workout. Its vacuum insulated design safely holds both hot and cold drinks. It keeps them hot or cold … Continue reading Thermos Water Bottle Review, Vacuum Insulated Hydration Flask