Well not quite bottomless but I can pack way more than I should in the Patagonia Lightweight Travel Hip Pack. Any given day I have it loaded with my iPad 3, my iPhone, my iPod, a knitting project, loose change, house keys, sunglasses and dog poo bags. With room to spare. It's held up, no loose seams etc and the zippers are a bit more water resistant than most. (as compared to my Granite Gear Nighthawk.) My only regret? I wish I would have waited for the recent Ikat Purple colored bag rather than the Rubellite Pink from last season.