In the past I used standard waterers - typically the 5-gallon bucket with tray. I have my chicks on the brooder bottle nipples right now and am in love with them. But I will eventually need a grown up setup for the hens. I would like to do a gravity fed system, as low cost as possible. I am making chicken tractors for them now and I would like to be able to attach a PVC pipe in the tractor and be able to move a stand where the bucket sits or something. (don't have it all figured out) So if you have pictures of your nipple waterer system, please post them here to give me some ideas. Thanks so much. Here is a picture of my 2 week old chicks and their brooder bottles - these are just 2 liter bottles in a calf bottle holder. The brooder bottle cap is sold by The Chicken Fountain, screws on any soda type bottle.