Abstract: A new bottle cap comprising a cap body and at least one air-return valve having a drinking port and an air-return port which is correspondingly disposed to the air-return valve are disposed on the cap body; an anti-leakage valve is disposed in the drinking port; the place where the air-return port is located extends inwardly to form a convex portion in the cap body; one end of the air-return valve is connected to the convex portion in a matching way, and the other end of the air-return valve is a closed port structure; one end of the air-return valve is designed to be a closed port structure, which can effectively prevent the air in the cap body from outflowing through the air-return valve.

Abstract: A rollable heat preservation cup, comprising a cup cover, a fixing ring, a bottleneck, and a two-layered cup body which further comprises an inner-layer cup body and an outer-layer cup body, wherein the two-layered cup body is a rollable and soft cup body, wherein a heat-preserving material layer is disposed between the inner-layer cup body and the outer-layer cup body, wherein a fixing ring is disposed between the bottleneck and the cup body, wherein the upper end part of the two-layered cup body is firmly embedded into an inner space formed by the fixing ring and the bottleneck.

Abstract: The present invention relates to a bottle neck structure comprising an inner ring and an outer ring, a plurality of protrusions and a plurality of recesses; wherein the inner ring further comprising a plurality of display panels, an annular rim, a top facing surface; and wherein the outer ring further comprising a annular groove, a bottom facing surface and one through hole, and wherein each of the display panels can be viewed through the through hole when they are aligned.