I bought one for my 2 year old at Walmart, it was back in the baby section near the baby cups, bowls and such. It is was on clearance for about $3.00 or so. It is on the smallish side, but still big on her has a pocket section maybe 3"x3" or so (it is not around so I am guessing on the exact size) and holds a water bottle, which it came with. The bottle is kind of opaque, I wonder if maybe the water bottle rule is a new rule? They had red and a blueish purple color if I remember correctly. The strap section velcros shut, no buckle to deal with for little ones, might be a good thing, but bad as they can remove it if they want to.