Abstract: A cup includes an air cushion, which has first and second plastic sheets, an elastic plate, a compressible component, and a third plastic sheet; the first sheet has an air inlet; the first and the second sheets are joined together to form an air receiving space between them; an air passage exists between the elastic plate and the first sheet to allow air to flow into the air space; the elastic plate has a displaceable portion, which can be disposed in a first direction to have a concave contour and allow the cushion to be inflated, and which can be disposed in an opposite direction to have a convex contour and allow the cushion to be bled; the compressible component is resilient and interposed between the air inlet and the displaceable portion, and can contain air therein; the third plastic sheet has a hole facing the displaceable portion, and an air outlet exists between the third plastic sheet and the elastic resilient plate.

Abstract: A cup includes an air cushion, which has first and second plastic films, an elastic plate, a pressed component, and a short plastic film; the first film has an air inlet; the first and the second films are stuck together to form an air room between them; a flow guiding passage exists between the elastic plate and the first film to allow air to flow into the air room; the elastic plate has a recess portion, which can face a first direction to allow the cushion to be inflated, and which can face an opposite direction to allow the cushion to be bled; the pressed component is resilient and interposed between the air inlet and the recess portion, and can contain air therein; the short plastic film has a hole facing the recess portion, and an air outlet exists between the short film and the elastic plate.