Below is a list of Clamshell Packaging manufacturers from Canandaigua, New York. Clamshell packaging is a common product packaging design that features a folded piece of clear plastic (or two pieces) with fused edges and molded or stamped faces. Clamshell packaging is one of the most widely used packaging designs in retail contexts, though it can be impractical in the distribution of industrial or commercial products in large numbers.