Do you own any of the bottle caps that were once everybody are excited about? I actually do received quite a few emails asking me for ideas using them. I have a great friend who actually sent a few of these bottle caps to me. I've once used it to embellish on a flower but I guess that's not enough to satisfy the requests...lol!
Therefore, in my recent project, I've actually distressed a bottle cap and used it as an embellishment. Simply use some alcohol ink and a brush to paint over the bottle cap and let it dry. I've later, use a small hammer to create some dent to it and let it open up a bit. You can add details by stamping on it or on card stock and later cut and paste on it. You could also add some vintage images or even a flower or two on it. Then, punch a hole on it and attach it to your project.