Weaning your baby from breast-feeding to drinking from a cup depends on your baby's need to suck and his ability to drink from a cup. A baby is usually ready to be weaned to a cup between 9 and 18 months. If your baby is less than 9 months old, you should wean him to a bottle first. When your baby is 6 months old, you can start giving a cup, but wait to wean your baby completely until he is about 9 months old.
You can use breast milk or infant formula in the cup until your baby is 1 year old. If your baby is over 1 year old you can use regular whole milk.
If you use formula:
Your baby is weaned when he takes 16 to 20 oz of milk by cup each day and has solid food for 3 meals a day.
If your breasts get engorged because you are not nursing as much, let your baby suck 15 to 30 seconds from each breast to relieve your discomfort. Make sure that you don't breast-feed any longer, however, or you will trigger your breasts to make more milk and the engorgement will get worse.
Setbacks in weaning can be caused by many things, including stress, major changes in meal or bed times, or illness. If you have a setback, it’s OK to wait until things calm down, and then continue weaning your baby. Call your baby's healthcare provider if you have any questions or concerns.