- All drinks are mainly water, with either leaves, roasted beans, sugar or fermented stuff added
- Dumping said stuff in water increases the price sometimes by several orders of magnitude
- All of that money could be spent on much more important things, like cake, or perhaps given to charity.

## Water vs Coffee Calculations

Envelope calculations (probably all wrong) to try to get a feel for how much money could be saved if everyone just drank water. Obviously this is naïve and doesn’t take into account the supply chain economics, etc.

- Volume of a mug: 0.3459 litres
- Price of tap water (metered): £0.24 $0.36 per litre
- Approx. cost per cup of water: £0.083 $0.127
- Approx. cost per cup of coffee: $1.915 £1.247

- Number of cups of coffee drunk per day: 2.25bn
- Approx. amount spent on coffee each day: $4,308,750,000 £2,805,168,600
- Approx. amount for the same quantity in water: $286,651,921 £186,750,000

Difference (amount that could be given to charity): $4,022,098,079 £2,620,344,611

Sources:

- Price of water: OFWAT
- Mug: Wolfram Alpha
- Coffee per day: The ‘Latte Revolution’? Regulation, Markets and Consumption in the Global Coffee Chain

Thanks to Brennan Novak for finally prompting me to publish this somewhere public.