I have small 200ml cups that only need a little milk. If I froth a small amount of milk directly into a large jug, the milk stays too low at the bottom, which means it doesn't produce good foam. But I prefer watering with large 720ml jugs. That's why I first take a small amount of milk, approx. 170ml, which can only be frothed perfectly in a small jug. I then pour the foamed milk into a large 720ml jug, which I like to use to pour the beautiful patterns into the cup. The 600ml pots work just as well for latte art. Smaller jugs like 600ml are less suitable for latte art.