Abstract: A thermal pot including a heat-insulative hollow shell having a top mounting groove and a bottom mounting flange, a rim having a mounting flange fastened to the top mounting groove on the shell by ultrasonic welding, a heat-insulative lining fastened to the inside of the shell and connected to the rim by a connecting member, a base covered on the shell and the lining at the bottom and having a mounting groove fastened to the bottom mounting flange of the shell by ultrasonic welding, the rim a plurality of stop blocks and retaining grooves around the periphery, the connecting member having a first coupling portion fastened to an endless bottom mounting groove on the rim by ultrasonic welding, a second coupling portion coupled to an inside lip on the shell, and a third coupling portion coupled to a top lip on said lining, a heat-insulative inner pot put in the space defined within said lining and having a pivoted handle for carrying, and a cover detachably covered on the shell over the inner pot, the cover havi