At the risk of sounding like everyone else, they are too pretty to burn. <G> I am currently using sawdust, but not the thin, small sawdust that you can get free from Lowe's or Home Depot. I use the wood chips that you get when you cut trees with a chainsaw. I find that they light faster and burn longer than regular sawdust. I tried using the paper cups, but found that the paper absorbed the wax too much and it was hard to get the paper to light.