when they are babies they can clean the nares in these waterers because their little bills are so tiny.
You can also take small platic containors with lids and cut holes into the lids to make just enough space for their heads.
@Miss Lydia makes them for her ducks and has pictures Im pretty sure
dont give new ducklings water in a bowl or they will swim in it and get wet and cold and can die. I use a waterer something like this
https://www.qcsupply.com/420311-plastic-poultry-waterer.html
and a feeder thats similar shaped.
IF you feed ducklings anything other than starter crumbles with 1...