Need another oil reservoir for your Fossil Lamp candle. Here it is. This oil reservoir holds enough Ultrapure Paraffin to burn up to two hours. Remember to pull the wick down, into the glass wick holder, until there’s just a tip of the wick showing. Your candle will burn much longer. The reservoir is four inches tall and an inch wide, at the top. It has a cotton wick, that will burn down over time, so your reservoir also comes with a permanent, fiberglass wick.