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1. A drug delivery device comprising: a housing; a drug container coupled to the housing, the drug container including a needle; a needle shield disposed at least partially over a distal end of the needle of the drug container; a removable cap coupled to the housing; and a needle shield remover coupled to the removable cap and the needle shield, such that uncoupling the removable cap from the housing removes the needle shield off the needle of the drug container, the needle shield remover comprising: a body having a tubular configuration with a first end and a second end, the body formed from a sheet of material having a first longitudinal edge opposing a second longitudinal edge; and a closure coupling the first and second longitudinal edges together to form the tubular configuration of the body, the closure comprising: a plurality of teeth extending laterally outwardly from the first longitudinal edge; and a plurality of grooves extending laterally inwardly into the sheet of material from the second longitudinal edge, the plurality of grooves being configured to receive the plurality of teeth to couple the first and second longitudinal edges together, wherein each of the plurality of teeth extends generally perpendicularly away from the first longitudinal edge; wherein each of the plurality of grooves extends along an axis at a non-perpendicular angle with respect to the second longitudinal edge, such that the plurality of teeth bend as each respective tooth enters a respective one of the plurality of grooves, a first plurality of barbs arrayed around a circumference of the body adjacent to the first end, the first plurality of barbs gripping the removable cap; and a second plurality of barbs arrayed around the circumference of the body adjacent to the second end, the second plurality of barbs gripping the needle shield, wherein the removable cap comprises a central wall and an annular wall disposed within the removable cap, wherein the first plurality of barbs is configured to grip the central wall, and wherein the annular wall is spaced outwardly from the central wall and configured to engage an outer surface of the first end of the body.
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