Olive oil works really well for indoor lamps. Lehmanns sells olive oil lamps, pretty much a jar, a wick and wick holder. After seeing theirs, I made one using a glass jar, paper clip, and a cotton wick. Gotta say it works really well and there's no smell or residue. I wouldn't use an olive oil lamp camping in bear country (might as well ring the dinner bell) but for the home its a great alternative to paraffin.