Many pharmaceutical companies use a standard size of blister pack. She worked on the music group Bohemian Quarter's album "Blister Pack Voices". Came on a blister pack as a "Two Ninety" replacement engine. Extra ribs are added to the blister pack to improve its stiffness. Each one comes in a special "BrickArms Reloaded" blister pack and are rare. The relevant "1-75" series number is printed on the blister pack or box. The standard Slammer Whammers product was a blister pack containing 24 milkcaps and 2 slammers. Unlike the 'official' range each blister pack contains 10 miniatures&colon; 9 troops and one leader.