According to one aspect of the invention, a shipping container with an integrated pallet has a narrow width adapted for maximum utilization of the available space in standard sea containers, and openings for the tines of a forklift are spaced so that adjustment of the tines is not necessary in order to fit the narrower container. The container has an open top, opposite end walls, opposite sidewalls, and a bottom wall. The pallet is attached on top of the bottom wall and comprises a pallet deck, with runners secured between the deck and the bottom wall in inwardly spaced relation to the side edges of the container so that the runners are located inside the fork footprint rather than outside the fork footprint. The tine-receiving openings are thus positioned outboard of the runners and under opposite side edges of the container. The opposite side edges of the container between the pallet deck and the bottom wall are reinforced by down-turned flanges on the pallet deck that are secured to an inner surface of the sidewalls. According to another aspect of the invention, confronting flaps form inner wall panels in the sidewalls or the end walls of a container, and interlocking structure on confronting edges of the flaps lock them together to resist separation thereof.