Abstract: A beverage vessel (10) whose constriction resembles a typical coffee mug except for the fact that the hollow handle (16) of the beverage vessel (10) is hollow with one end of the hollow handle (16) connected to the container (12) at a normal location; at the bottom side of the container (12), with the hollow handle (16) then passing over lip of the container (12) at the opening (14) of the container (12) with the other end of the hollow handle (16) connecting to the container (12) at the bottom of the container (12). The hollow handle (16) hollow feature extends through its connections to the container (12) on both the lower side and bottom of the container (12). This configuration allows a communication between the environment outside of the beverage vessel (10) container (12) through the hollow handle (16) at the bottom of the container (12) and the contents of the container (12) through the hollow handle (16) connected at the lower side of the container (12.

Abstract: A vessel (20) is fabricated with a separate evacuated hollow volume (26) in the side wall (22) and bottom (24) of the vessel (20) that allows for the insertion of a paddlewheel radiometer in the evacuated space. The bottom (24) and side wall (22) of the vessel (20) are made so that selected portions are transparent thus the paddlewheel radiometer assembly (28) portion of the radiometer can receive light energy and be observed to spin when the vessel (20) is exposed to a light source. The assembly (28) rotates on a hub located along the central axis of the vessel (20) in the center of the of the evacuated hollow volume (26). The rotating assembly (28) includes perpendicular vanes (30) that radiate outward along the radius of the vessel (20). Each of the vanes (30) is blackened on one side and mirrored or white on the other side. The assembly (28) is constructed so that it balances horizontally at its center hub.