As part of the two-sided Kolorcoat process, darker Kolorcoat items may have a faint or lightened edge. This does not affect the artwork on your products as it is only on the outer edges.
With bottle openers we strongly advise that your text stays at least .25 inches from the edges and holes. Some small discoloration can occur near the opener hole during the print process as the metal is indented to accommodate the function of bottle opening.