Each Clip-n-Seal item now has it’s own UPC code. We’ve added them for Amazon.com and future retail. I guess I could also tattoo myself with the one for the 891639001014 variety pack or all of them. When signing up for the barcodes, I felt a bit like that old clip from Bush 1, who didn’t know what a UPC was or how it worked. For more, see the Wikipedia entry and How Stuff Works.