Those eye watering 270mg coffees must be a shock for anyone used to Starbucks. Above 400mg typical adults can start feeling unwell. >500mg (2x Pret filter coff

Those eye watering 270mg coffees must be a shock for anyone used to Starbucks. Above 400mg typical adults can start feeling unwell. >500mg (2x Pret filter coffees) and most will have a bad time.