Osprey returned my Manta 25 (22L) pack, after re-inserting the bladder support panel the eBay seller had pulled out. With the support in, I conclude there is no way the pack will hold a 3 liter water bladder, 7 days of food and a small stove. This is difficult to conceive, since my cycling pal has a 28L and it holds vastly more. Back to the drawing board on that one. I think I will need to actually go to a store to buy one, taking 7 days of food and the stove with me. I did carry it around while day hiking and it is really comfy and holds day hike stuff fine. The bladder and bite valve are really nice, far nicer than my life partner's basic Camelback.