I have started before 2yrs of boy but I never stopped it completely, I hv transferred him gradually .. n now he is raised to drink on his own with tumbler .. so no need to hurry let the kid learns it slowly .. if think ur baby ready then switch it ..
Hi! I started my boy on straw cups when he was 20 months old, but only for plain water as it is quite hard to clean in insides of the straw. He started drinking directly from a cup (no straw) at about 24 months old
Hi. You may find this article useful: https://sg.theasianparent.com/smooth-transition-from-feeding-bottles-to-cups/
Preethi Ganesan