How can I keep the brooder dry with ducklings?

[Kaufmann's Backyard Farm]

Anyone have some tips for keeping the little darlings from spilling water everywhere? Last time I use a regular waterer with a screw on base and put marbles in it at first so they didn't drown, but I had to take them out in a week or so because they couldn't get tjier whole beak in the water. After that it was a disaster. I had to change the bedding 3 times per day. Anything I can do differently, or is it just the price you pay for having ducks?