To provide a reusable, easy-to-clean plastic drinking container and a cleaning device for the same to solve the problem that perfect cleaning is difficult for a conventional plastic drinking container, such as a PET bottle, and a cleaning device for the same.

The reusable, easy-to-clean plastic drinking container has a ground surface, where the base of the container extends along the circumferential wall of the drinking container, and an almost conical floating bottom formed at the center of the ground surface. The diameter of the ground surface is approximately 2/3 of that of the circumferential wall of the container, the height of the floating bottom from the ground is approximately 1-5 mm, and the part of the container circumferential wall that ranges from a point at 1/3 to 1/2 of the height of the circumferential wall to the ground surface has a curved section with a given curvature.