DUH!!!!! Why didn't I think of that?! Put aluminum foil in a bowl, pour the grease in. When it hardens, roll up the foil and throw it out!
Shield a muffin tin from burned-on batter drips by laying a foil sheet across it, snipping an X over each cup, then popping in liners. - One of 101 "new uses for things in the kitchen" from Real Simple.
DIY tin candle holders