Company that invented the hydration system, a fancy canteen with a tube that fits on your back. Invented by a former paramedic. by attaching medical tubing to an I.V. bag and sticking it in a sock.

A brilliant idea--a hands free, high capacity water reservoir that you wear on your back. If you do any sort of intense physical activity, especially when it's hot, you'll want one. It doesn't have to be a Camelback brand either--lots of companies make them.