I have the Design Originals idea book "Cards, Mini-Books, & More!" In there they use a purchased beaded bracelet and added decorated bottle caps to it using jump rings. To punch holes in the bottle caps they say to use either a hammer and nail/screw or a 1/16 inch paper punch.
If you're interested in purchasing bottle caps, I just bought a ton and will be getting rid of extras at cost plus shipping.
Here's the link to the
Design Originals idea book.
HTH,
Santell