Bottle Cap

Abstract

A bottle includes a reservoir including protrusions on a neck, each protrusion having a horizontal latch, an inclined surface on a bottom of the latch, and a recess between the inclined surface and the protrusion; a cap including an inner top wall, an internal annular wall, and projections on an inner surface of the annular wall; and a disc shaped sealing member including a raised edge and flexible elements on a top. The sealing member is in the cap to engage the open ends of the flexible elements with the top wall and rest the raised edge on the engagement surfaces of the projections. In response to rotating the cap on the neck, the projections ride along the inclined surfaces to be locked in the recesses, the open ends of the flexible elements urge against the top wall, and the sealing member is airtightly disposed on the neck.

What is claimed is: 
     
         1 . A bottle comprising:
 a reservoir including a neck and a plurality of protrusions formed on an outer surface of the neck, each protrusion having a horizontally projecting latch, an inclined surface formed on a bottom of an end of the latch, and a recess formed between the inclined surface and the protrusion;   a cap including an inner top wall, an internal annular wall, and a plurality of projections formed on an inner surface of the annular wall, each projection being parallelepiped and having an engagement surface on a top, the engagement surfaces being flush; and   a disc shaped sealing member including an annular raised edge, and a plurality of flexible elements formed on a top, each flexible element being upward inclined toward a center and having an open end wherein the sealing member is disposed in the cap to engage the open ends of the flexible elements with the top wall and rest the raised edge on the engagement surfaces of the projections;   wherein in response to putting the cap on the neck and clockwise rotating the cap, the projections ride along the inclined surfaces to be locked in the recesses, the open ends of the flexible elements urge against the top wall, and the sealing member is airtightly disposed on the neck.   
     
     
         2 . The bottle of  claim 1 , wherein underside of the sealing member is shaped to be capable of seating on the neck. 
     
     
         3 . The bottle of  claim 1 , wherein the projections are either spherical or multisided.