The heart design on the top is cold enameled, which sounds posh but its epoxy resin with glitter mixed in!
To make you will need:
Small sheet of copper or brass five inch square should be plenty, about 1mm thick.
Few inches of scrap copper wire. I used old electrical wire and stripped off the plastic.
Leadfree solder & flux.
Fast set epoxy resin. Comes in two tubes.
Bit of red glitter.
Pencil torch or soldering iron.
Step 1: Mark out the copper
Step 2: Cut out the side of the box.
Using the wood template as a guide, work the strip around the the wood until its heart shaped. Cut off with snips at the back so a solder joint can be made. What you end up with looks like a cookie cutter, clean the two surfaces of the joint ready for soldering.