Heres a great tool to make bottle caps.
Well I was glueing my images to the bottle cap and someone told about this sticker maker. Its 12.99 at Michael's but if you take a 40% off coupon you get a great deal on it. Its simple and fast to use too.
Here another great tool to make perfect circles. Make sure its the 1" one. There $3.99 at Michael's but dont forget the coupon :)