content: I got this in the mail a couple days ago. It wouldn't let any water out at first so I figured I had to play with it a bit to get it to work. So some water comes out and I put it in Midnight, my dwarf hamster's cage and don't check on the bottle. Tonight I found out that she hasn't been drinking since she got it. I took it out, trid to figure it outm and eventually put it back and got a little bin of water. When I came back into the room with the small dish, she was going crazy trying to get water out of the bottle.This may have worked for some people, but it was absolutely useless and made Mid not have ANY water. Not to mention made me feel like a parent neglecting her child.The only reason I even realized it was because I didn't recall hearing her lapping at the metal ball at the end. If I hadn't have checked, who knows what could have happened.If you were planning on buying this for a non-leak bottle then I suggest just cleaning up extra wet pieces of bedding.