Been using the previous style of this--stood up tall "portrait" orientation--for 5 years of backpacking, and it has been overall well worth the money, more durable than it looks, easy to use and clean. Just this weekend a pinhole developed in the bottom corner of my 5-yr-old bag, so will replace it with this new style if I cannot repair the leak myself. Turning the old version on its side ("landscape" orientation) should cure the old problem of being top heavy and occasionally spontaneously falling over unless on absolutely level surface or less than full. The old-style too-stiff zip-closure top never worked more than a few times but turns out I really didn't need it, anyway--just folded over top to keep out leaves and bugs (maybe this new version zip closure is improved?). I attached a leash to the cap to prevent losing it.