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A freshness keeping cup including a cup body and a check valve disposed therein. A U-shaped fixing inner sleeve member and a fixing outer sleeve member are secured with the lower portion of the cup body. A leakproof ring and a top flange of a soft bellows member are clamped between the bottom of the

A freshness keeping cup including a cup body and a check valve disposed therein. A U-shaped fixing inner sleeve member and a fixing outer sleeve member are secured with the lower portion of the cup body. A leakproof ring and a top flange of a soft bellows member are clamped between the bottom of the inner sleeve member and a top surface of an upper slide sleeve of a slide assembly. An outer lower surface of a top flange of the upper slide sleeve abuts against an inner upper surface of the bottom portion of the outer sleeve member. A top flange of the middle slide sleeve is engaged in a bottom flange of the upper slide sleeve and a top flange of the lower slide sleeve is engaged in a bottom flange of the middle slide sleeve. An upward inward projection is formed on the top flange of the lower slide sleeve. Engaging grooves are formed on lower inner portion of the lower slide sleeve for engaging with corresponding engaging hooks of a bottom cover for securing the same. The bellows member is disposed within the upper slide sleeve and the middle slide sleeve for containing a liquid, whereby when the bottom cover is pressed upward, the liquid is permitted to flow through the check valve into the cup body for drinking.

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A freshness keeping cup comprising: a cup body stepped with an upper section and a lower section, said lower section being formed with male threads and a bottom central conic projection, several vent holes being formed around said projection at equal intervals; a check valve disposed under said proj

A freshness keeping cup comprising: a cup body stepped with an upper section and a lower section, said lower section being formed with male threads and a bottom central conic projection, several vent holes being formed around said projection at equal intervals; a check valve disposed under said projection and made of rubber, plastic or metal materials, having an upper ring portion disposed under the top of said projection and a connecting portion downwardly tapered from said ring portion and a lower conic base portion, the tip of which is connected with a lower end of said connecting portion, the lower conic base portion being able to move upward to compress and bend said connecting portion; a U-shaped fixing inner sleeve member having female threads screwed onto the lower section of said cup body with an upper end abutting against a step edge of said cup body and a lower end contacting the outer bottom surface of said cup body, a check valve seat being disposed at a central portion of said inner sleeve member whereby the conic base portion of said check valve can be fitted in said valve seat, a through hole being formed under said valve seat; a fixing outer sleeve member having female threads screwed onto a lower threaded portion of said inner sleeve member; a soft bellows member having an upper flange, a bellow body and a bottom portion with an inward recess; and a slide assembly including an upper slide sleeve, a middle slide sleeve, a lower slide sleeve and a bottom cover, wherein a top flange of said middle slide sleeve is engaged in a bottom flange of said upper slide sleeve and a top flange of said lower slide sleeve is engaged in a bottom flange of said middle slide sleeve, an upward inward projection being formed on the top flange of said lower slide sleeve like a step portion, said recess formed on the bottom portion of said bellows member receives said projection, engaging grooves being formed on a lower inner portion of said lower slide sleeve for engaging with corresponding engaging hooks of said bottom cover for securing the same, the outer diameter of said bottom cover being slightly larger than that of said upper slide sleeve and said bellows member being disposed within said upper slide sleeve and said middle slide sleeve for containing a liquid, whereby when said bottom cover is pressed upward, the upward inward projection of said lower slide sleeve urges the recess of said bellows member to move upward so that the liquid contained therein starts to flow and forces said conic base portion of the check valve to open upward permitting the liquid to flow through said through hole into said cup body and when the pressure disappears, the check valve closes the vent holes so that said bottom cover can control the amount of liquid entering the cup body for drinking, and when said bottom cover reaches the lower end of said middle slide sleeve, the same is also urged to move upwardly into said upper slide sleeve to compress the liquid into said cup body, the contracted bellows member having a dimension which is equal to that of said upward projection so that the liquid can be totally dispensed outwardly without remaining in said bellows member.