Leftover scraps of gift-wrapping ribbon, various lengths and widths
1. Cut an image to fit the size of the bottle-cap interior and glue it in, pressing to make sure the image lies flat.
2. Take one of the wider ribbons and tie it into a bow proportional to the size of the bottle cap.
3. Then, take a thinner ribbon, preferably one with wire in it for stiffness, and thread it through the top of the bow's knotted center. Once threaded, pull ribbon to desired length and tie a knot at the top to form a loop.