I've tried many different brands of small pet bottles. Critter Brites is the only bottle brand I have used that has had virtually no dripping. It has the metal ball in the spout to stop the water flow and it does it well. The rubber washer is thicker than most so this might be what keeps it drip free, I'm not sure. These kinds of bottles are not the easiest to clean, but a baby bottle brush makes cleaning it easier. It's not available at my local pet stores all the time so you might have to look around for it or ask them to order it for you. I use the 16 oz. size and don't know whether it comes in other sizes. I've only seen it in the neon orange color which is a bit bright for my taste, but as long as it remains drip free, I'm happy.

Pros: No dripping; durable hanger

Cons: no color selection