Push button cap containing an additive for containers

In a combination of a container having a threaded neck forming an opening communicating with the interior of said container and a liquid dispensing element selectively threaded upon said neck element, the improvement comprising said liquid dispensing element including an outer cap having a planar end wall having a central opening therethrough, and a cylindrical internally threaded side wall;

• a capsule element having a first lower member and a second upper member slideably engaged therewith;
• said first lower member including a cylindrical side wall having a radially extending flange at an upper end thereof forming a seal between said threaded neck of said container and said outer cap, and a lower wall frangibly interconnected to said last-mentioned cylindrical side wall at a lower end thereof;
• said second upper member including an upper wall and a cylindrical hollow shank having a principal axis perpendicular to the plane of said upper wall and penetrating said opening in said planar end wall of said cap, said shank having a lower free edge overlying an area of frangible interconnection between said lower wall and said cylindrical side wall of said second upper member;
• said capsule element being positioned within said cap such that said upper wall of said second upper member contacts said upper end wall of said cap, engagement of said cap with said threaded neck of said container serving to elevate said capsule element relative to said cap and move said upper wall of said second upper member into spaced relation relative to said planar end wall;
• whereby downward pressure exerted upon said upper wall serves to cause movement of said shank relative to said lower wall of said first lower member to sever the frangible interconnection between said lower wall and said cylindrical side wall.