Weaning from a bottle to a cup is dependent on your baby's need to suck and his ability to drink from a cup. A baby is usually receptive to weaning between 9 and 18 months. When your baby is 6 months old, you can start introducing the cup, but wait to completely wean your baby until he is about 9 months old.
You can put breast milk that you have pumped in the cup. You can also use formula in the cup. Use iron-fortified formula until your baby is at least 1 year old to prevent iron-deficiency anemia. If you baby is over 12 months you can start using regular whole milk.
Plan ahead and give yourself and your baby plenty of time. Gradual weaning gives your baby time to adjust.
When your baby is taking at least 4 oz. from the cup at each meal, you can stop giving the bottle. Drop the bottle for the least preferred feedings first. The evening meal is usually a baby's favorite and is generally the last bottle-fed meal he is willing to give up.
If your baby is taking a daily total of 16 to 20 oz. of milk by cup, in addition to 3 meals of solid food, and doesn't appear to miss the bottle, he can be considered successfully weaned.
Setbacks in weaning can be caused by many things, including stress, major changes in meal or bed times, or illness. If such setbacks occur, wait until the situation improves or the illness is over, and then continue the weaning process. Call your baby's doctor if you have any questions or concerns.
Do not give the bottle to your baby in bed. Not only may it cause tooth decay and earaches, but your baby may equate the bottle with security and comfort and therefore be reluctant to give up the bottle.