Has anyone tried the Amphipod water bottle belt thing advertised in Running Times? I am tired of carrying water bottles on my long runs and I run where there are no water fountains or mini marts. I had a Fuel Belt and wore it once, before throwing it in the trash. I don't have a roll of fat around my stomach to keep that thing from slowly migrating off my waist to just under my ribs. I don't need to carry much water and I don't carry gels or the like, so I am considering the smallest one. Any constructive opinions? Does this thing stay on your waist? Thanks.