I post lots of ideas, but once in a while I am shocked - shocked - that a particular item doesn’t already exist. Case in point: this thermos/beverage container fashioned after a Duracell coppertop. Considering our dependency on coffee as a source of energy, it makes perfect sense. It also helps that the design of the battery closely resembles your typical thermos.

The protruding contact on the top of the cup is spring-loaded, allowing the cup to sit flat on surfaces.