Don't pay for somebody else to make your tea! A cup of ordinary tea should cost, like, 15p. That includes teabag, electricity, water, milk, and amortized cost of kettle and mug.
Even if you buy something unnecessarily expensive, like fancy matcha tea powder, you're looking at less than 50p.
Even if you buy something unnecessarily expensive, like fancy matcha tea powder, you're looking at less than 50p.