Until 1980, I would not have dreamed of drinking tea without milk, but green tea tastes horrid with milk. And to get brown tea I had to take it with me. Also, Canadian caned evaporated milk did not help either, why Canadian milk in Algeria not a clue.
To make my tea bags last out, one in a kettle and re-boil it, cup for me, cup for next door and fill my flask, had to make 150 bags last 12 weeks.
As I continued my travels, Falklands again no fresh milk, and Hong Kong tea drunk cold, and of course turkey tea near black as was the coffee.