Abstract: The invention is a utility totebag system that can be carried by a person. The system includes an outer carrier shell and at least two interchangeable, removable liners with varying characteristics adapted to differing requirements of transporting various small items. Any number of specialized liners can be includes in the system with preferable design choices for the set of interchangeable liners including one made of water-resistant material, and/or one made of thermally insulating material. Optionally an interior closure strap is provided to narrow the opening of the totebag. The interior of the outer carrier shell has means for temporarily attaching any one of the set of interchangeable liners. Each liner has matching attaching means. In alternative embodiments, the shell and/or the liners have a flexible flap of material that covers and protects the attachment means.