Choosing the right milk pitcher size depends mainly on the amount of milk you normally steam at one time.
350ml / 12oz Milk Pitcher
Best suited for: Cortados, Flat whites, Small cappuccinos, Single smaller drinks, Smaller pitchers provide good control when steaming relatively small amounts of milk.
450–500ml / 15–17oz Milk Pitcher
A versatile option for: Standard lattes, Cappuccinos, Most home espresso setups
This size offers a good balance between milk capacity and pouring control.
600ml / 20oz Milk Pitcher
Suitable for: Larger lattes, Preparing more milk at once, Higher-volume workflows, Users who prefer more steaming space
Important
Do not fill a milk pitcher to the top before steaming. Milk needs room to circulate and expand as air is incorporated.