3 hours ago, Thanks for the Crepes said:
I'm not sure if she actually drinks this or not, but I have some Twinnings of London Earl Grey tea that is marked "By appointment to her majesty Queen Elizabeth II" on the labels.
Yes, the much valued "by royal appointment" is a personal statement that she is responsible for the choice to purchase that particular tea. It does not necessarily mean that she drinks it, though. She does have guests.