My Cayuga Ducks use a small rubber pan - used for feed for horses. I got it at Tractor Supply and it holds about 10 gallons of water. It is big enough for 2 ducks to swim in (barely) and for them to wash their beaks I have even a smaller pan (about the size of the bottom of a canner/steamer). It holds about 1.5 gallons of water. This way it is easy for me to haul water in the winter. Plus being the rubber, the black pulls in the heat from the sun in the winter. I have a creek out back for them when they free-range but they prefer the buckets most of the time. I also have used a kiddie sandbox (plastic turtle looking) and they loved that. it is stronger than the kiddie pool. As long as they can wash their bodies and especially be able to get their heads under water to wash their beaks is all they need.
