You get 15 tea bags in the box so at least£7.95 for 15 tea bags it works out at 53p per cup.
Some luxury tea bags (like Tea Pigs you can use for two cups) I didn’t find these to extend more than one.
I got this box of Mint tea from Fortnums and Mason, Moroccan Mint green tea for Christmas and it tasted of nothing. The packaging spectacular but the individually wrapped tea bags first of all difficult to remove from the wrapper without busting the tea bag. You obviously get the health benefits of green tea, it would definitely be improved with a few sprigs of fresh mint.
For me the best value Mint Tea bags are Tesco Finest, sadly they don’t sell them in any of three tescos near me so it means shopping online for one thing which makes them too expensive and defeats the object.
Tea pigs mint tea I love. The cost about £10 in Waitrose for 40 bags about 0.22p per cup.
These tea bags will definitely stretch to more than one cup