TIL There's an ISO standard for brewing tea

https://en.wikipedia.org/wiki/ISO_3103

"ISO 3103 is a standard published by the International Organization for Standardization (commonly referred to as ISO), specifying a standardized method for brewing tea, possibly sampled by the standardized methods described in ISO 1839"

And Ireland wasn't happy because it omitted prewarming the pot:
"Ireland was the only country to object, and objected on technical grounds"