@chai2,
Oh, here's something I get back from the kitties...
I use scoopable litter, whichever is on sale.
Sometimes the brand I buy comes in a plastic tub. 27 pounds, which is a little over 3 gallons.
I'm looking at a free bucket, with a handle even!
A few months back I was looking for the cleaning bucket, to mop the floors, and Wally was using it outside.
Being in the middle of cleaning, I was a mess, and also had no interest in running out to a store to spend money on another one.