To turn a cutter into a mold, run masking tape along the edge, snip at the corners, and fold the tape outward so the cutter sits flat on the foil.
Coat molds with petroleum jelly; set aside. Place beeswax in double boiler over barely simmering water. Stir wax as it melts with craft sticks.
When wax reaches pouring temperature (150 degrees for paraffin, 160 degrees for beeswax, or as soon as a film forms at the edge of the pan, pour into molds. Carefully lower in the tea-light wicks. After candles harden (1/2 hour to 2 hours), lift them out by their wicks. If they resist, freeze until they pop out easily. Wipe candles clean with paper towels. Trim wicks, if necessary, to 1/4 inch before lighting.