transfer the required amount of milk into that. in our case , take ½ cup milk.
DO NOT ADD anything to milk.
take a hand blender and blend the milk for 5-6 mins at least.
you will get a nice layer of foams in the milk.
use these foams in your coffee.
if is there any remaining milk, store it in a refrigerator and use it as regular. BECAUSE we are NOT using coffee machine here, milk will come in a normal stage after some time.