I love yerba mate. My family traveled to Argentina when I was a kid and I remember we were delayed for about 4 hours before our flight back home late in the night. I kept making myself yerba mate teas while the lounge had the movie Screamers playing on an old CRT tv. It was foundationally terrifying to a deeply-wired and awake 10 year old kid.

As a teenager I found a seller selling it on Amazon in bulk, I bought 3 kilos of it and my friends all joked that I was buying 'kilos from South America', but that tea lasted me years.

As an adult I found that brewing it in a drip coffee maker seemed to pull out more of the chemicals that woke you up and I had a period of my college years where my grades shot up from how productive I got.