We searched long and hard to find the most effective milk frother, and were surprised when this simple manual system turned out to be the easiest to use and also the most effective. With a half dozen strokes of the plunger, heated milk becomes filled with the tiniest of bubbles. Transfer to a small pitcher and swirl a few times to make perfectly textured light, creamy milk. Turn an espresso into a delicious latte or cappuccino. You can even make your own latte art.