I use a hanging water bucket with drip nipples on the bottom.
		
		
	 
That's called a vertical nipple waterer. I had one, I found it dripped, which was ok outside in the summer. My cockerel would watch the drip fall, then look for it on the ground. 
 
I've had open waterers... the water gets icky and stuff gets in it. I've gotten a horizontal nipple waterer with the little cups, and those got stuff in them too. A regular HN waterer was baffling to my cockerel 

 ; he couldn't figure it out.
I made a waterer out of a milk jug. I put a peanut butter jar full of sand in it for ballast, which also works as a heat sink, because I bring it in at night and set it by the wood stove. That was free, works well, and will probably freeze in the middle of winter, keeping me busy going out with warm water. (Yup, that's Michigan, ain't it!)
I may get a heated waterer. The open style waterer, whether purchased or made from a milk jug, has been the easiest for my chickens to use. Especially my cockerel. 
