I actually use one of the cups my bettas came in to slowly scoop water back into the tank. It works pretty well for me, but then again, my tank is only 2.5 gal. With a 10 gal tank or larger I can see that getting really annoying.
OFL: You are awesome in the most awesomest way possible. I'd love to be able to attach a chain and hook to my ceiling to hang water buckets from. (o_o) <3