This is called the Pisco Sour and apparently it is Peru&#39;s most popular drink.  If you want to make it yourself, here is a recipe for it:    3 parts pisco brandy  1 1/2 parts lemon juice  1 - 2 tbsp sugar    I have no idea where you would get this particular brandy, but I did find out that it has a bit of a tequila flavor, so it might be worth trying to find...maybe at a specialty store?    Anyways I thought I would share and put it on my list of things to try in my lifetime!