Quote Originally Posted by KSH View Post
I use the Nathan handheld water bottle. I have used this up to 26.2 miles and I like using it. I won't use a belt around my waist as I can see where it would get VERY ANNOYING to have the water sloshing around, etc. Not to mention, it gets in the way of where I swing my arms.
I never have this problem. I wear a belt with one center back waterbottle (21 oz) and a pocket on either side of it. The trick for me is to wear the belt snugly and not have it in contact with bare skin. Then it stays put and doesn't move around.

Wore mine on a 10 mile run this morning. Except when accessing it, I never seem to notice it.