Abstract: Separable modular containers in the form of rectangular parallelepipeds are each formed from identical separate individual blanks of corrugated fiberboard or other sheet material, and include provision for separably securing at least two such containers together laterally. Each blank forms a separate, complete flat container adapted for lateral loading and to hold a single layer of canned goods or the like therein. Each container includes at least one specially formed connecting flap which is modified from one of the minor flaps of the container, which connecting flaps on two mating containers serve to secure opposite ends of the two containers together along adjacent sides. Another embodiment provides two connecting flaps per container, of which only one is needed for each container to be joined to a second container. Thus, the remaining connecting flaps may be used to connect additional containers in a multiple container flat.