Ok, so this is like a huge debate. Along with what kind of bedding to use, wheels, and cages...blah, blah, blah. I usually will either use 32 oz rabbit water bottles with the nozzle that has a kind of pin in it that moves to let water out, they're from tractor supply and cost about $9 bucks each. They don't leak AT ALL, but sometimes our hedgehogs will have trouble using it. Or I'll use the glass 16 or 26 oz Living World water bottles that you can only find online usually (amazon), sometimes you can find them at Pets mart, and those are just a standard ball tip. They leak occasionally, not very often and they're definitely the easiest that I've found for hedgehogs to use. They are also about $9 or $10 bucks. There's also the new water bottle that has come out that's handmade out of a baby bottle by another breeder, and we just got one but were still training our hedgehog to use it, so results are up in the air. So what do you guys use that you like? Cuz I'm always on the prowl for an absolutely great water bottle.