First, cut out a wide oval shape out of cardboard. It should be about 7 x 8. Put 6 bottle caps in a circle in the middle of the cardboard. If you don’t like this idea you could use just one large lid, like a lid from a paint can. I used hot glue for this project which doesn’t hold metal together very well which why I needed the cardboard for support. If you use some kind of glue for metal then you might not need the support.