A food-processing device for chopping, mixing, or liquefying foods. The device comprises a container, a removable base, and a blender base. The container comprises a locking member located at the periphery of the container. The container has an opening. The removable base comprises a blade member and is removably affixable to the opening of the container. The blender base comprises a motor and a recessed well. The recessed well comprises a pressure-activated switch and an interior wall having a locking surface formed therein. The removable base is adapted to removably fit within the recessed well such that such that the locking member of the container is capable of both engaging the switch to activate the motor and capable of biasing against the locking surface, thereby permitting continuous operation of the motor without requiring a user to exert a constant force on the container.