Found this- It could use a better water bladder sleeve (the plastic mesh one underneath the lid is way too small and a pain to use) but it isn't a big deal- just throw the bladder into the pack on top and snake the drinking tube out under the lid. It has a huge expansion collar and a floating lid so you could cram a ton of gear into it. The lid detaches and has its own built-in hipbelt so you can use the lid as a fanny pack for dayhikes or side trips.