Staying hydrated is one of the best things you can do for your body. But it's not always easy to keep track of your water intake. The Thermos Connected Hydration Bottle with Smart Lid is out to change that. The bottle links to a companion app that has you enter your age, weight, and activity info to create a customized hydration goal, then lets you know how you're doing throughout the day. The bottle can also sense how much water is left and check its temperature, giving you a heads up if you're about to chug some nasty hot water.