Beverage container with detachable reusable heat transfer cartridge

Abstract

A beverage container that has a removable cap at the top end and a cavity in the bottom end into which is removably inserted a shell containing a freezable substance to cool or heat the contents of the container. The insert is releasably lockable in the container cavity and preferably tapers for a snug fit in the cavity.

1 . A beverage container comprising a cylindrical body having opposite respective top and bottom ends, said top end being open, screw threads on said cylindrical body and surrounding said open top end, a cap member having means thereon threadingly engagable with the screw threads on said body, a cylindrical cavity in said bottom end, said cavity being disposed generally centrally of said cylindrical body and having a first initial entry portion of selected diameter and a second continuing elongate portion that projects a selected distance into the interior of said container, said first initial entry portion being of greater diameter than said second continuing elongate portion and a heat transfer unit removably insertable into said cavity for use in heat transfer contents contained in said beverage container, said heat transfer unit comprising a shell, of suitable material, confining therein a freezable or heatable material, said heat transfer unit having first and second contiguous cylindrical portions so dimensioned as to inter-nest in said cavity it said container.  
   
   
       2 . The beverage container and insert therefor as defined in  claim 1  including means on said insert and means co-operating therewith on said container to retain said insert in said cavity.  
   
   
       3 . The beverage container and insert therefor as defined in  claim 1 , wherein at least said elongate portion of said cavity is tapered decreasing a selected amount in diameter in a direction away from the bottom end of said container.  
   
   
       4 . The beverage container and insert therefor as defined in  claim 1 , wherein each of said insert and cavity have cylindrical outer surfaces and wherein they taper decreasing a selected amount in a direction away from said bottom end of the container.  
   
   
       5 . The beverage container and insert therefor as defined in  claim 4  wherein said cavity and insert have corresponding mating tapers with the surfaces engaging one another when the insert is in it's in use position in the cavity.