US Patent 9750360 Double-walled glass insulated containers and method for producing same

A double walled glass container comprising an inner glass vessel for containing a liquid beverage is nested and hermetically sealed to an outer glass vessel, forming a unitary assembly with a co-extensive planar surface between inner and outer vessels. Said inner vessel is so constructed as to provide a gap between the two vessels wherein the interstitial space is an insulating air gap providing an insulating effect between the inner and outer vessels. The inner vessel also extends above the hermetic seal creating a single wall drinking rim. In addition, a customizable brand name or logo can be applied to the outer face of the inner vessel such that it is protected from the harsh environment of chemical cleaning and everyday use.