Vial Holder - This diagram illustrates DFA (Design for Assembly) details inside the vial holder design. Basically, it is a one-piece clam-shell like injection-molded part in which 3 individual components – cap, back cover and front cover – are connected together. The vial will first be anchored in the receiver formed by back cover and cap, and then the cap can be broken away from the connectors to the back cover. Finally, the front cover swing back 180 degree to snap into the back cover and to secure the vial