Babies learn to drink water in three stages: nipple type, duckbill type and straw type. So use the duckbill cup first, and then use the straw cup. Parents can choose the right cup according to their baby's age.
Before the baby is 6 months old, it is more convenient to drink water with a nipple-shaped cup because the teeth have not fully grown out. After six months, the baby can transition from a nipple cup. You can use a duckbill-shaped cup for your baby first, which will be easier to use than a straw-shaped cup, and the suction port will be larger, making it easier for your baby to accept. After the baby is 9 months old, there are more teeth coming out. After the ability to control the lips is enhanced, the sucking power is even greater. You can change the baby into a straw cup.
Some babies can directly change the bottle drinking cup into a straw drinking cup instead of a duckbill drinking cup, which reduces the process of cup education and saves a lot of time. Specific can choose according to the baby's situation, not a fixed standard.