The cup must have a high bottom.
There was not a lot of coffee in it.

3 euros 40s worth, that was two cups we were not sharing this time.

She has clean nails today

No idea on the price of the cups, that was just for the coffee.
If that was the coffee as served isn't it a 'standard' coffee size (un café svp) in a large cup and at €1.70 that's a fair price?
Like Ken Goodwin you are too good for this place
If you had a petit crème .. i.e an espresso in a medium cup plus a small jug of (hot) milk on the side then 1.70€ is a most reasonable price. But then I noticed a biscuit in your photo .. so we would be asked to pay around 2€ or more to include that.