A seat/flatbed/drop-in-container assembly for a cart comprises a framework extending from and supported by the cart, including at least one support member, and defining a volume of space interiorly of the support member and a remaining portion of the framework. A seat is supported by the framework within the volume of space and adapted to extend to define a flatbed supported by the framework within the volume of space. A container is adapted to be dropped in the volume of space and supported upon the flatbed. To secure the container to the framework upon the flatbed, the support member extends through an aperture disposed completely through the container and/or is interferingly fitted between a body of the container and lip of a rim thereof. Alternatively, to secure the container upon the flatbed, the seat includes a seat back, and the container defines a flange that holds the seat back.