I introduced sippy cups first then change to cup. But p1 can just use cup already. Tell her she is a big girl already, lets sit at the dinning table and finish her milk together with you.
Try to let ur LO learnt how to drink via cup with a straw inside the bottle.
Try to use cup to let her get used to using cups to drink during recess
Use a cup instead.. P1 is old enough
Progress to cup
Try using cup
milk in cup
Use cup
try cup