I have the Lixit bottle with the ball at the end, I saw the ones that have the little "sticks" (Not sure what they are really called) but to me, when I stuck my finger at the end of it, it seemed rough, or like it would hurt their tongue, so I didn't like those, but I love my lixit with the ball, it has a good seal, and it was around $7.00 I think. the other one I like is from walmart, I can't remember the name of it, but either way, it doesn't leak, and its a 32 oz bottle (my lixit is too) and I LOVE them both, I also have 2 other bottles as back ups, ones a critter canten (not my favorite) and the other is a Home Rigg Home brand (never heard of it before either) also not my favorite, but they serve as good back ups. I plan on buying 2 more lixits to keep filled and in my fridge for summer time, so they have cool water at all times, since it gets pretty warm here, even though they are kept inside, I feel like they will still feel the effects of the summer heat.