A blank for being repeatably assembled into a box configuration without the use of adhesives. The blank has a bottom panel, a side panel foldably attached to the bottom panel, an end panel foldably attached to the bottom panel, and a locking structure configured to secure the side panel and the end panel in respective orthogonal positions with respect to the bottom panel. The locking structure includes an overlay panel foldably attached to the end panel and foldable toward an overlying position in which it overlies a portion of the side panel. The locking structure also includes a slot in the bottom panel, a flap foldably attached to the bottom panel and extending into the slot, and a tab foldably attached to the overlay panel for being lockingly received in the slot to secure the overlay panel in the overlying position.

A container formed from a blank of sheet material includes a bottom panel, first end panel, and first side panel that together form a first corner of the container. The first corner is secured by a first corner locking member. The first corner locking member is struck in part from a first corner flap and in part from the first side panel. The first corner locking member is hingedly connected to the first corner flap along a first fold line. The first corner locking member is inserted through a slot formed through the first end panel and into a first corner aperture formed through the first side panel, wherein the first corner aperture is formed by folding the first corner locking member out of plane with the first side panel.

A storage bin is constructed from a single-sheet blank of corrugated plastic or any malleable material and includes a rectangular bottom panel, a pair of opposing side panels connected to the bottom panel through corresponding fold lines, and a pair of opposing end panels connected to the bottom panel through corresponding fold lines. A side extension flap is formed on each end of each side panel and is connected to its adjacent end panel by a solid, foldable, circular sector gusset. Gussets enable the lower portion of storage bin to be configured into its assembled state without the use of cut lines or openings, thereby rendering the bottom region of the storage bin waterproof. A plurality of buckle-type locking mechanisms are formed in the blank and are configured to be articulated through fitted openings in select panels to releasably retain the storage bin in its assembled state.