I made my lemongrass & citronella candles in old vegi cans. I have a Pamper Chef can opener that leaves a smooth edge when the can is open. I save the lid for when the candle isn't in use I can cover it. To help prevent any damage the hot can might cause, I trimmed a piece of cork and glued it to the bottom of each can. The cork was from a old message board I had laying around.