If anyone's not sure what values to input, it looks like the values provided (67mg and 130mg) are for roughly one 40-50ml serving of espresso followed by 2x tha

If anyone's not sure what values to input, it looks like the values provided (67mg and 130mg) are for roughly one 40-50ml serving of espresso followed by 2x that (a double espresso). I usually have one espresso (or lungo) after breakfast and another after lunch. So this means that this extra shot at ~13:00 means I have over 2.4x the caffeine in my system at 22:00 than if I'd only had the morning coffee (3.6mg vs 8.83mg). Not sure whether I expected any different since twice the coffee works out to roughly twice the caffeine (since I go to bed a little later) :-)