Water Bottle Problems Fixed

So I was having a little issue with my rats pulling down their water bottle. I have them in an aquarium and I haven't put together a watering system. Anyway, I ran across this (http://www.egerbil.com/sites/default/files/wbh7.jpg) and it works great! I don't know if anyone else was having this problem but this is an easy homemade solution. Hope it helps.