Abstract: A multiple use commuter case or bag which may be attached to a handle or the like of another bag, case, etc. This case accommodates articles that may not suitably fit in a primary carrier such as shoes, foods, supplies, bulky equipment, or personal articles. The case affixes to the primary carrier by a strap allowing both articles to be transported as one. When the case in not needed, it can be detached, collapsed, and rolled up. The strap then fastens around the case so that it remains rolled up.