How Large Is Your Latte

So Waitrose have caused a stir by announcing that they’re going to stop supplying disposable cups with their free coffee. Now, these days they are most often my takeaway coffee of choice, so clearly I’m going to have to jump on the bandwagon and start carrying a reusable cup. And that of course is where it starts to get complicated.

Now technically I already own one reusable cup; it’s a Starbucks one, used for peppermint lattes on long journeys, but it gets too hot to hold without the little cardboard sleeve so it’s less useful outside of a Starbucks. So perhaps an everyday cup is in order, ideally one that will also seal in the dregs when I put it back in my bag.

Now in the last few months there have been myriad reusable coffee cup reviews and comparisons so it didn’t take me long to narrow my preference down to either the KeepCup or the Ecoffee cup. In the process however I became aware that I would have to make another decision – how big a cup to buy.

Waitrose had only said “bring your own cup” and that it needed to fit in their machine*. So I contacted them to ask both the size of the regular latte from the machine but also the size of the large, which they sell in their cafe. After talking to them via customer services and Twitter I finally established that a regular coffee is apparently 8 fl oz and a large one is 10 fl oz (although the disposable cups they use are much bigger).

But by now I was considering the bigger picture. My main alternative coffee supplier is Costa, but I’m not hugely fussy, I’ll buy a coffee wherever is convenient, so I started comparing coffee sizes and prices.

Naturally I made a little spreadsheet so here are the highlights. Coffee sizes vary widely but in general a regular coffee is 12 fl oz. Caffe Nero and Greggs also do a large at 14 fl oz whereas Starbucks and Costa will super size you at either 16 or 20 fl oz (I rarely need a pint of coffee).

Obviously, the cheapest coffee is free from Waitrose but astonishingly the most expensive would be a large coffee from Waitrose if you have to pay for it.

After free Waitrose coffee, Greggs and Costa are cheapest. Allowing for the discount for bringing your own cup doesn’t change much except that Pret is now cheaper than Costa (that’s because Pret gives you 50 pence off as opposed to Costa’s 25 pence). Caffe Nero give you ‘bonus stamps’ on their loyalty card, I only allowed for the one extra coffee that gets you when calculating the discount (so not including the ordinary loyalty stamps).

If you want value for money in volume then large coffees are generally better than regular ones and again, obviously, don’t pay for coffee in Waitrose!

Where does that leave me? Well, despite the lure of the ‘value for money’ argument of a larger coffee, I think a 12 fl oz cup would be big enough for an everyday coffee cup. Now I just have to choose the design I want.

*Waitrose reckon 15cm is the maximum cup height that fits in their machines.