I just saw this thread and though I will share with you my tutorial for 1" bottlecap images on 4x6" paper.
You will find it on my blog here: http://folie-du-jour.blogspot.fr/201...ap-images.html
You will learn how create your bottle cap images with the free software Photofiltre 7.
I'm also sharing a lot of free digital bottle cap images in the blog. Feel free to browse and use the images for your projects.