Comment by leidenfrost

Sometimes native doesn't mean right.

Try brewing yerba mate in front of an Argentinean/Paraguayam, using using a thermal bottle. Also, boil the water in an electric kettle and pour a bit of cold water on the bottle to bring back the temperature to 80°C

They'll go bananas on how mate isn't served like that, on how you ruined it, etc.

But you can do it like that just fine. And it can be perfectly brewed like that and the taste will be the same.

People just like treating their ceremonies like shaolin kung fu.