For longer morning runs at warmer summer days but it does very well in the meantime be able to have a drink. Mostly I need at 90min to also as 3 to 4 of these vials. Although I recommend still mineral water, not tap water! For the latter one has a nasty plastic taste. In still mineral water at all! You have to get used to having this belt with the four bottles around while running and you think all the time, he is unstable unsure. But at some point you have then found the correct position and tightness. Certainly there are straps that hold even better while running, but it was good enough for my needs!
