Abstract: A modular apparatus for storage and transport of goods, primarily for use as a backpack. A first container for holding goods is provided with a first cooperating engagement portion, and a base is provided with a second cooperating engagement portion; the first and second portions cooperate to provide meshing engagement to detachably connect the first container the base. A stop is included in at least one of the first or said second cooperating engagement portions to limit the downward travel of the first container relative to the base. Further containers can be added, where each of the further containers includes cooperating engagement portion for meshing engagement with a complementary cooperating engagement portion of the already mounted containers. Preferably, the first cooperative engagement portion is a T-shaped slot formed from a pair of complementary, mirror image L-shaped members, and the second cooperative engagement portion is a T-shaped bracket of size and shape complementary to the T-shaped slot.