What ever is handy, tupperware, bowl, old icecream container what ever. I like a tight lid although I found fruit flies can somehow still get in there. I do try to empty ever night after dinner mess has been cleaned up.
I use to have a nice crock, but since it was ceramic it didn't last long here. Dh broke it, lol.
We use any old bowl we grab. It gets taken out twice daily and rinsed out w/the hose each time. Fruit flies are about to be an issue, so we'll probably start keeping a bucket w/lid on the porch. It will still get emptied daily.