COMBO PEN

摘要

A writing instrument having a substantially tubular body including a first and second end and a writing tip associated with the first end. The writing instrument includes a receptacle integrally formed within the second end and having a retaining portion to engage a removable auxiliary module including a securing portion, the removable auxiliary module adapted to be secured within the receptacle by the cooperation of the retaining portion and the securing portion. The writing instrument further includes an auxiliary module cap adapted to engage both the second end adjacent to the retaining and securing portions and the first end adjacent to the writing tip.