What kind of water bottles? I thought they had to be able to dip their bills up to their nostrils to clear them or something like that? I use water bottles for my chicks inside, and seramas and love them. If I could use them for ducklings too, and just give them water a few times a day to play and bathe in that would be so much easier. Right now my set up contains the mess mostly to one little area, with their food and water in a little litter box and I just have to dump and fill that litterbox instead of cleaning the whole brooder, and isn't too bad, but the less mess the better.We have switched over to water bottles for the ducklings. Things get way to messy the otherwise. While they are less than a week old they get a normal water cup to drink from but once they are a week or so old we transition them to the water bottle. They pick up on it very quickly because they are attracted to the shiny metal. It's really helped knock the stink down in the inside brooder. Plus frequent cleaning of course.