I've gotten spoiled by our new Nespresso machine and was craving some foamy milk for my coffee today at work. I figured there'd be a tip on the ol' Internet to make foamed milk without a machine that's specially designed for the task. Well, it's kind of obvious, but an effective technique is to vigorously shake some milk up in a jar and then heat it up in the microwave. The issue is that this works extremely well and you need a good amount of room left in the jar before warming since it gets very foamy and voluminous and can easily bubble over. Once the milk is warmed, you need to spoon to foam out. Otherwise it just stays in the jar when you pour your milk into your coffee.