Introduction At six months, babies begin to learn to taste different foods, and the food they eat gradually changes to semi-solid and solid foods. At this time, drinking milk gradually changes from breast milk or formula milk to other types of milk and milk products. Many parents will consider using a duckbill cup instead of a bottle to feed their babies at this time. So, which one is more suitable for a six-month-old baby to drink from a milk bottle or a duckbill cup? Stages of Baby Development A six-month-old baby\’s growth and development gradually increases. At this time, they begin to grow their teeth, develop their oral gums, and gradually increase their oral muscles.