Et tu, Guinnéss?

uhmbah@lemmy.ca to Mildly Infuriating@lemmy.world – 426 points –

500ml to 440ml?

Edit: the 440 on the right, is the last of a can that I bought in a four pack. The 500 on the left, is one of three I bought as singles.

Packaged Guinness comes in 440 milliliters. Single cans of Guinness come in 500 mL.

Apparently, that's how Guinness does it here in Canada.

And apparently, I lazily avoided any attempt to research or apply any level of critical thinking before posting.

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In Britain lots of beers come on both sizes, and it makes comparing prices #mildlyinfuriating. Is 6x500ml at £7.99 better than 4x440ml at £4.50? What if there's an 12 pack of 330ml stubbies for £15, but it's Buy One Get One Free?

Purely curious myself, I asked GPT4 for you. This is the response:

Here’s how the prices compare per liter:

•	6x500ml at £7.99: £2.66 per liter
•	4x440ml at £4.50: £2.56 per liter
•	12x330ml at £15 (Buy One Get One Free): £1.89 per liter

The 12 pack of 330ml stubbies (with the Buy One Get One Free offer) offers the best value at £1.89 per liter.

GPT4 is wrong and it doesn’t require a price per litre comparison to prove it.

4 cans at 440ml cost £4.50. Therefore 12 cans at 440ml cost £13.50, £1.50 less than 12 cans at 330ml.