GREASE! (No, not the musical)?

I need to know of a better way to store and properly get rid of grease. Most people say to use old coffee cans for storage/disposal purposes. That would work, except that I do not drink coffee. I sometimes use old margarine buckets, but that does not consistently work because the grease fills up before my next margarine runs out. What I have been doing (in between margarine buckets) is using plain tupperware containers, but that gets a bit expensive. Any ideas/thoughts?