I am one for recycling, and this is my latest project. I used a 1X4 long enough to mount 6 -64 ounce empty, plastic juice-bottles, on each side of the board. I cut a semi-oval out of the upper portion, and use the removed piece, as a shim, to reinforce the bottle, that is mounted with two screws, to the board. My idea is to put feed on one side, and water on the other. I have used bottles, cut with this opening, as feeders in portable cages, that I use at swap meets, with satisfactory results. This project is hard to tip over, even when empty. Each bottle will still hold about a quart, of water or feed. We go thru a lot of juice, so have plenty of empties on hand.