The 1600 cocktail. The website hosting the recipe seems to be offline but it's from East Imperial Tonic Water.
50ml / 1 ¾ oz Premium Aged Rum.
5ml / ⅙ oz Orgeat.
15ml / ½ oz Cold Brew Coffee.
150ml / 5 oz East Imperial Grapefruit Tonic.
Fresh Orange Slice.
Stirred everything but the soda (I used a spoonful of tonic syrup and 150ml of Fever Tree grapefruit soda) and no I can't measure 5ml of orgeat, just poured as little as I could.
It's a lot better than it sounds, honestly. The coffee makes it. And hello to the 1,600 of you!