USB pen drives are a unique and fun promotional opportunity. For some this style brings back childhood memories of secret code pens and communicators. They are a great way to conceal memory devices because they are sleek and compact. The pens styles also will function as pens! Some are only able to be laser engraved. Plastic pens can be ordered in colors and can be imprinted. Recycled materials are used in many UBS drives including pens.