Osprey Women's Kitsuma 3 Liter Hydration Pack - When you want to carry water on your back-and almost nothing else-the women's Kitsuma 3-liter bike pack has you covered. Carry a few essentials, be it a multitool or some light snacks, with its minimal storage while the included next-gen Hydraulics 2.5-liter reservoir provides ample hydration for your afternoon or all-day rides.