Drug delivery device having removable cap

A drug delivery device including a housing, a drug storage container, and a removable cap is provided. The removable cap may be configured to be removably coupled with the housing such that the removable cap has a storage position where the removable cap is coupled with the housing and at least partially covering an opening in the housing and a removed position where the removable cap is not coupled with the housing. The removable cap may include an outer portion, an inner portion, and a gap separating at least a portion of the inner portion and at least a portion of the outer portion such that the at least a portion of the outer portion is allowed to bend with respect to the at least a portion of the inner portion if the at least a portion of the outer portion is subjected to an external force. Additionally or alternatively, the removable cap may be configured such that an external force applied to the removable cap induces at least one bending moment in a proximal end and/or a distal end of the removable ca