You may not be heading out for a super-long training ride, but you still need to stay hydrated throughout if you want to hit your time goals; it sounds like the minimalist CamelBak Hydrobak Hydration Pack is in order. This lightweight pack carries a 50-ounce Antidote reservoir, which will keep your fluid levels up over the course of a 1.5-hour ride; a small external pocket holds your cell or indispensible multi-tool.