What kind of water bottle do you use on your runs?  I usually don't take any water along with me because the the feel of a half bottle of water sloshing around with every step is really annoying.  I've tried the belts with the mini bottles but they ride up on my waist and become just as uncomfortable!!  Anyone have a good solution here?  My mileage is starting to creep up and with the summer heat coming on I know I'll be forced to take water with me sooner or later.  Thanks...