Argentina already has a mate stamp and it feels quite inadequate for it to be "their thing". What differentiates uruguayan mate drinking to argentinian's way and paraguayan's way? well, the termo. It is not uncommon to find uruguayans drniking mate everywhere, it is not reserved to be a house activity, we drink it everywhere, in our jobs, in the park, in the beach, in the bus (although it's prohibited) and there are hundreds of videos of tourists noticing this fact from the uruguayan culture. Also Uruguay is the country with the highest consumption of yerba mate per capita in the world, reaching an average of 10 kilos per year per person. This represents a total consumption of 34.8 million kilos per year. We deserve a Termo stamp at least! In fact, termo is so important that we have a termo called "Botija" as the official mascot of The Uruguayan Football Association (another important part of our culture). I also think that a Tereré stamp for Paraguay would be valid for this mate drinking trio! https://youtu.be/BHXSWCjvxe8?si=S3NB1FP4a6RAOGVA (video showcasing what I said above)