Patent ID: 8141740

Claim:
A portable beverage container system comprising: a container body including: an external housing having an inner surface and an outer surface and constructed of a durable metal material, wherein the external housing defines an open-ended housing cavity, and wherein the external housing is tapered such that the interior diameter decreases in a direction from a top of the external housing towards a bottom of the external housing; an internal liner having an inner surface and an outer surface and constructed of a crystalline ceramic material, wherein the internal liner defines an open-ended liner cavity, and wherein the internal liner is tapered such that the exterior diameter decreases along an entire length of the internal liner in a direction from a top of the internal liner towards a bottom of the internal liner; wherein a portion of the internal liner is fixedly attached to the top of the external housing; wherein below said attachment, the exterior diameter of the internal liner is less than the internal diameter of the external housing such that a cavity is defined between an inside surface of the external housing and an outside surface of the internal liner; wherein the exterior diameter of the internal liner is more tapered than the internal diameter of the external housing along its entire length such that said defined cavity is larger at the bottom of said container system than at the top of said container system; wherein the internal liner is partially disposed in the open-ended housing cavity such that at least a portion of the internal liner extends above the external housing through the open-ended housing cavity; and wherein the internal liner is maintained within the external housing.