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Comment by kristofferR | Hacker News Reader

This study is Irish, so I think they likely use 170ml cups? That means a normal mug of ~500ml is 3 cups.

Perhaps they even use US coffee cup size, which is 118ml?

Honestly, using an unit of measurement that varies from 118ml to 250ml in a scientific paper brings the whole paper into question.

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> a normal mug of ~500ml

woa where is half a liter of coffee a "normal" portion?

500mL is a pretty typical size for a travel mug/tumblr. I'd consider that two or three servings though.

500mL of Americano (diluted coffee) is not 500mL of espresso. I challenge you to drink half a litre of espresso in one sitting.

Okay, you'll definitely have to explain the NORMAL mug of HALF A LITER!

I'd say it reaches abnormal above 500ml, but there's nothing abnormal about mugs like this: https://www.ikea.com/no/en/p/faergklar-mug-light-pink-506048...

It seems people think 500ml is more liquid than it is due to how thin cans/bottles are comparatively.

The reactions to your comment got me curious enough to check. The mug I use for coffee and tea holds almost exactly 400 mL when comfortably full and I used to drink 2 of those per day (across 12 hours or so). Based on that, personally I'd consider ~800 mL of black coffee to be on the high end of moderate consumption.

Yeah, people think 400-500ml is a lot for some reason, but it’s not a abnormal coffee mug size at all. The Ember mug I have is around 430ml.

I’m Irish.

A NORMAL mug of 500ml??? this is insanity to me

I didn't say 500ml, I said ~500ml. 500ml is quite large, but 400+ ain’t really that abnormal.

Does it matter what size the cup is? Usually you get the same amount of coffee water + additional water/milk/whatever.

What you're describing applies to coffee shops where a latte has the same amount of coffee regardless of the cup size.

Others are mostly describing someone who makes coffee for themself at home or in a break room. That person likely chooses a cup size depending on how much they coffee they want, how frequently they want a refill, etc.

you're partially right. It doesn't matter if they had specified the grams of coffee beans they used to produce those cups. It would have been better to specify both number of cups and how they were produced.

????

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