The Rekindle Candle is a cool concept that uses the melted wax drippings from your current candle to make an entirely new one. It does this by capturing the drippings as they’re formed and shaping them into a candle. A wick is inserted in the middle, and the result is a fully functional paraffin light. Granted, the new candle will be smaller than the old one since some of the wax will have been burnt off, but still it’s kind of neat-o.
It’s a concept by one Benjamin Shine, and it’s technically not for sale, but the recent public interest in it has resulted in his contacting “several companies” to see if it can be brought to market. You can sign up to be notified if it ever ends up seeing light of day.