Under Armour, the powerhouse in sports base-layering, has a new line of water bottles built by Thermos. While these are pretty much like any other water bottle, they advertise a few handy features. The flip-top vacuum-seal lid is operated by a one-handed push button that makes for seamless, on-the-fly sipping. The bottles keep beverages cold for 12 hours and feature an ergonomic design and carrying loop. They're available from Dick's Sporting Goods in a variety of colors.
You can now get that distinctive, X-looking "UA" tattoed on your water bottle. More info.