CamelBak - Bicycle enthusiast Michael Eidson, is competing in a 100-mile race in the grueling summer heat of Wichita Falls, Texas. Water is vital to surviving the race, and there are few places to refill a water bottle. Eidson, an emergency medical technician by trade, decides to fill an IV bag with water and slip it into a white tube sock. Yes, a tube sock. Then he stuffs the contraption into the back of his bike jersey, throws the thin hose over his shoulder and clamps it with a clothespin.