Patent ID: 7308988
Filing Date: 2007-12-18
Classification: B65D

Abstract:
1. A cap to be attached to a port neck part of a container main body holding a liquid which contains a surface active agent, comprising: an annular inner ring part; and a plurality of ribs formed between the annular inner ring part and a peripheral edge part of an inner surface of a top surface part of the cap, the plurality of ribs including ribs with a first configuration of a first thickness and ribs with a second configuration of a second thickness, different from the first thickness, radially extending astride from the inner surface of the top surface part to an inner surface of a peripheral wall part of the cap, and integrally projecting inwards, the first configuration of the ribs being different from the second configuration of the ribs, and the ribs with the first configuration and the ribs with the second configuration being alternately positioned.