After printing a few chicken waterers with a large bowl attached, I realised all I really needed was the bottle connector and a container of some kind. Not printing the bowl saves a lot of printing time and a lot of filament! This is the bottle connector from the previous waterer, and all is needed is to attach it to a shallow container with waterproof glue (wider is better for stability).
Glue the bottle holder onto a wide shallow container. I always seem to have heaps of shallow take away boxes.....