Alex and the author started preparing cocktails in advance and storing them in the freezer, a habit they referred to as "batching". This involved simple math and a desire to be prepared, rather than any professional expertise. Having pre-made cocktails allowed them to serve drinks at the perfect temperature, without them becoming watered down by melting ice. The author enjoys being able to surprise friends with a perfectly prepared drink when they visit, making them feel like they're excelling at impromptu hosting.