Compressible carts and methods for using the same are provided. The compressible carts include a rigid frame having a front wall, a rear wall, a right sidewall, a left sidewall, and a bottom wall. The right sidewall comprising a first right panel rotatably coupled to a second right panel. The compressible carts may also include a first lock assembly integrated with the first right panel and the second right panel. The first lock assembly having a first condition for locking the first right panel to the second right panel, and a second condition for unlocking the first right panel from the second right panel.

Embodiments of the present disclosure may include a collapsible cart configured to transition from a closed condition where it may be folded up to an open condition where it may be expanded for use, the collapsible cart including a rigid frame forming a compartment, the rigid frame having a front wall, a rear wall, a right sidewall, a left sidewall, and a bottom wall, the right sidewall and the left sidewall may be configured to fold inwardly in the closed condition. In some embodiments, the right sidewall including a first right panel rotatably coupled to a second right panel. In some embodiments, a retractable handle mechanism is disposed at, within or adjacent the back wall. The retractable handle mechanism includes a hand grip attached to a telescoping assembly. The telescoping assembly is pivotably coupled at a proximal end to the bottom of the rear wall.

A foldable box body and a shopping cart using same are provided. The foldable box body includes a box plate, which forms an accommodating space. The box plate includes a front box plate and a rear box plate. A flexible folding portion is provided between the front box plate and the rear box plate. The front box plate and the rear box plate are foldable by means of the flexible folding portion. The foldable box body is provided on the shopping cart.