Lidded container

A container comprising a cylindrical container body, and a lid member coupled to the container body by a hinge so as to be openable/closable relative to an opening portion of the container body:

• wherein the lid member includes
• a top surface;
• an inner ring formed on the top surface;
• and
• a projected part which is formed on the top surface concentrically with the inner ring, and which has an outer peripheral surface provided with an outer peripheral surface projection along a circumferential direction;
• wherein the container body has a sidewall provided with;
• a first inner peripheral surface having an inner peripheral surface projection formed along the circumferential direction;
• and
• a second inner peripheral surface having an inner diameter different from that of the first inner peripheral surface;
• wherein when the lid member is in a closed state, the inner ring seals the container body by being fitted to the second inner peripheral surface of the container body;
• and,
• wherein when closing the lid member, the outer peripheral surface projection of the projected part contacts and slides over the inner peripheral surface projection of the first inner peripheral surface, to cause the lid member to be locked to the container body, with the inner ring sealing the container body.