As a one-handed rider, pulling and replacing the water bottle while pedaling is a no hands, bent over operation. Doable, but occasionally wobbly, and probably not suitable for groups. My kids got me a camelback to solve the problem. Works fine on commutes, inside the backback I carry anyway. For hard rides, I found that the breathing time lost from sucking and then swallowing, vs. squeezing the bottle, is more hindrance than help, so I usually end up waiting for a stop to hydrate. If I ever make any friends, maybe they can carry the water bottles and hand them to me between stops