"Could be used for smaller people as well..."
When I got the M.U.L.E. for myself my wife wanted a camelbak as well. Granted, she is a full grown adult, she is only 4'10". The regular sized camelbaks seemed too big on her. We found the mini M.U.L.E. and she loved it. Bladder isn't as big but it suffices for the type of hikes we go on, typically Mount Monadnock. Hers however does not have the flames on it, nor any design, a little too childish. But hey, it is meant for kids... as are most of her shoes. Point being if you are a little on the small side and want a camelbak, don't just deny yourself one because you cant find one your size, here it is.