Safe, easy hydration while biking. The Showers Pass VelEau 42 is a hydration system that does away with reaching for your water bottle or carrying around a heavy backpack-style hydration pack. The VelEau holds 42 ounces of water in a reservoir secured under the saddle and a special hydration tube runs the length of the bike and attaches easily to your bike frame with 2 magnets. To take a drink, simply grab the bite valve, take a drink, and then let the retracting cord and magnet re-secure the bite valve. Let your bike carry the weight of the water, not your back!