Abstract: A container is provided which is modified to operate for a secure business (e.g. a retail business for the sale of a restricted access product). The container has a first pair of opposing sides and a second pair of opposing sides with a first door leading into a security vestibule. A second door is provided from the security vestibule into a restricted access space (e.g. an interior retail space, in which a restricted access product is displayed and available for sale). A security checkpoint is provided in the security vestibule. The first door and the second door are offset from each other such that restricted access space is not visible to a visitor without passing the security checkpoint. A method of permitting access to a restricted access product for sale through a modified container is also provided.