I use clay pot bottoms[what the pot sits in to catch water, I forget it's name], also use plastic trays I found. I've also used old drawers and ice cube trays. ^.^
The metal feeder I bought, 20lbs I think, I don't use it anymore. Makes too much of a mess even if it's in a drawer to keep it in..lol.
It's for sale if anyone near me wants it...