Here is a practical gift. Add a ribbon and a clever note and this would be a great gift.
Place a book of matches and add a lid on it and you’ll have about 40-50 hours of light. These can be made for less than $2.00 if you are buying new jars, but less than $1.00 if you are recycling jars.
You could sell these for $5.00 easily, especially if you market them as “emergency” or “survival” candles.