Abstract: A beverage cup lid with a pull back type sipping hole includes a tab that is disposed at a predetermined position of a sipping hole. The tab has a substantially ?-shaped perforated portion extending from the top rim of a wall side to the center of a top side and a turnover portion formed after pulling off the ?-shaped perforated portion. A raised inclined plane is extended from the external side to the center. A straight rib is formed at the external side of the turnover portion beyond the ?-shaped perforated portion in such a manner that the turnover portion may be swiveled forward and downward at 270° and engaged in place, thereby forming a double layered structure on the wall side.

Abstract: An plastic portable heat insulation cup, comprising: a) an external cup made of plastic material by means of an injection molding process, a first lip rim being formed by turning the rim portion of the external cup inside out, an annular groove with the external wall protruding outward being integrally formed at a place 3-13 mm lower than the first lip rim, the distance from the annular groove to the protrusion portion of the cup bottom being marked with h1; and b) an internal cup made of plastic material by means of an injection molding process, the outer diameter of the internal cup depending on the inclination and the inner diameter of the flank of the external cup, a plurality of corrugations being formed in the flank of the internal cup such that a heat insulation space is created between the corrugations and the flank of the external cup, a second lip rim being formed by turning the rim portion of internal cup inside out, the distance from the second lip rim to the external side of the cup bottom being

Abstract: A beverage cup lid with a pull back type sipping hole includes a tab that is disposed at a predetermined position of a sipping hole. The tab has a substantially ?-shaped perforated portion extending from the top rim of a wall side to the center of a top side and a turnover portion formed after pulling off the ?-shaped perforated portion. A raised inclined plane is extended from the external side to the center. A straight rib is formed at the external side of the turnover portion beyond the ?-shaped perforated portion in such a manner that the turnover portion may be swiveled forward and downward at 270° and engaged in place, thereby forming a double layered structure on the wall side.

Abstract: An airtight food container includes a main body and a top cover that correspond to each other in their form and dimensions and, therefore, may be produced by the same mold in an injection molding process. A flange portion is formed at the rim of the main body. One half part of the flange portion is provided with a protrusion while the other half part thereof is recessed. Furthermore, an ear portion having an enlarged surface is formed at the protrusion portion and the recessed portion. Accordingly, one of two completely identical main bodies (the top one) is turned upside down (at 180°) such that the opening is directed downward and a top cover is formed. Besides, the recessed portion and the protrusion portion of the flange portion of the top cover just correspond to the protrusion portion and the recessed portion, respectively, such that the top cover and the main body fit into each other to form an airtight container.