I agree with Cristi...the xyron machine is what I use, you can get that at any craft store just about or walmart. I have the little one that does up to 1.5" stickers and is perfect for the bottlecap images and it is around $10. I used my 50% off coupon one time at Hobby Lobby and got it for $5
I did mess up the first couple that I did because like Cristi said....make sure you line it up right the first time because it is not going anywhere once it hits that metal bottlecap
Good luck & hope you can save the ones you already have done.