we have a GIANT dog crate that we keep our 2 great danes in and it has a plastic pan on the bottom of it. It's roughly 3' x 4' and has about a 1" lip around the outside of it.
I take it out of the crate, hose it off and dry it, set it on the floor, put 30 22oz bottles on it and fill them. Any spill over is contained by the plastiuc tray and when I'm done I put the bottles on the counter, cap them and then wash the tray off again and I'm all set and done.
I agree the dishwasher is probably easier, but...I'm the dishwasher