When capping vials, one of the choices you have to make is whether or not to use a flip-off cap. Flip-off caps on vials provide a physical barrier to the seal, help differentiate between products, and act as an indicator of partial use and tamper evidence. Often the flip-off cap style, material, and finish selection are made with little consideration to the post filling processes. This can cause headaches down the line that can be avoided with some forethought regarding identification, labeling, and handling.

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