I always use 10cl (3 ⅓ fl oz) for my Moscow Mule, especially when I use THE most intense Ginger Beer I know from Spain (20cl / 6 ⅔ fl oz). But this Vodka is so f***ing mild that it was really a waste of money trying this out. I usually use Absolut for Mules and I think I'm gonna stick with that. It was delicious, don't get me wrong! But a little bit "alcoholic spice" is just the counter part for that ginger beer I prefer. With exactly 4 large ice cubes, 2 wedges of lemon and 2 slices of fresh cucumber it makes the perfect drink for me.