Hey this might be a good idea to be used in humid countries like South East Asia with high temperature. However, i do agree this might need some improvement to be used in a colder countries, where logically they would consume hot drinks much more compared to warmer countries. Can't wait to see how this could be implemented in real life! great work!
This is such a great idea. It makes me sad to imagine beautiful nature like Great Barrier Reef is exploited because of human doings. Hope this idea could go global and contribute much more to the nature!