Abstract: A thermostatic cup structure that includes a cup body, a heating module and a base unit. The cup body is selectively attachable to the heating module and base unit. The base unit and heating module are structured such that they can accommodate cup bodies with different structures such as mugs, tumblers, and thermoses. Heating of the liquid within the cup body is powered by a swappable and rechargeable battery, contained in the base unit, that is connected to a heat plate through a conductive column. The ability to charge multiple base units anywhere USB-c power/adapters are available, and the fact that these base units are interchangeable with multiple variants of mugs (and can include thermoses, etc.) make this product unique in the market.