I have one of these small handhelds: http://www.amazon.com/Nathan-Quick-H...+bottle+nathan
I like that the neoprene sleeve just slips on your hand and you don't have to hold onto it. But it is small so I wouldn't use it for anything longer than 4-5mi.
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.