Simply fill 2L bottles with water and put in rack. Rack has a sloped roof to keep chickens from roosting. Rack attaches to wall or post. Here's the end to dirty waterers. Rack comes with 2 bottle caps with nipples attached, you supply the bottles. You must put an air hole in bottom of bottles or cut bottoms off, leave in rack and fill with water. Chickens easily adapt to this style of waterer. Rack in picture is unfinished plywood construction, great for indoor use. If you use outside, paint the rack OR I can build your rack out of cedar for $25 + $15 shipping. Shipping is $15 for all racks.