How many cups of coffee are sold in a city each day
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The prompt
Estimate the number of cups of coffee sold per day in a city of 2 million people.
First, define "sold". Most coffee is made and drunk at home, and none of that is sold by the cup. In the United States in 2025, surveys by the National Coffee Association found that about 3 in 10 daily coffee drinkers had coffee made away from home on a given day. So we estimate cups bought ready to drink: from cafes, kiosks, and shops. The survey figure also includes some free coffee at work, so 3 in 10 is an upper bound for cups actually sold.
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