Bottle Cap Craft/Decor Ideas?

Backed with cork and felt, they make really fun trivets. Use a strong glue (any of the Goop brand glues would be great -- get them at a hardware store or crafts supplies store) glue all your bottle caps together to form a square or hexagon or similar shape. Glue that to the cork and then the felt. Let it dry outside or in the garage for a couple days to let the smell wear off. Good glue usually stinks pretty badly.