"I bought this for my chameleon, because I thought it would better than my cheap hole-in-the-bottom-of-the-cup long term.
The lady at the pet shop did tell me that because of verying atmospheric pressure, from day to day I would need to adjust the valve.
The product looked cool, but I worried about how strong the hanger on the lid would hold up to the weight of the water. The little hose kept popping off when I was trying to figure out how to hang it in his enclosure.
I fooled around with this thing for hours and hours. It would either pour water out or not drip at all. I needed to get a drip that would drip water out every minute or every 5 seconds or so. I managed to get a very fast drip going, which I wasn't satisfied with, but I thought it would be alright.
I went out and came back and the little dripper was empty and water was everywhere. It must have decided to return back to the "pour" level.
After playing around with it for the rest of the night, I decided to just put the cup back on top of his reptarium.
I returned the little dripper, because the cup works very very well. It drips water out as fast as I need it, and I don't have to worry about it suddenly pouring water out. Whenever I want the water to last longer, I just fill the cup with ice-cubes. Problem solved!"