Following the success of her first thermoelectric flashlight, Ann began experimenting with different heat sources to power similar devices. The concept of using the waste heat from a hot drink presented a practical and appealing challenge.

Ann worked on refining the design of the eDrink powered flashlight, focusing on improving the efficiency of heat transfer and energy conversion. She conducted extensive testing to optimize the performance of the device and ensure its reliability.

Ann publicly presented her eDrink powered flashlight at various events and exhibitions. While specific details about commercialization are not widely available, the invention showcased her continued dedication to innovative and sustainable energy solutions. It is possible that development continued or partnerships were explored for potential market entry.