Can a 9-Month-Old Use an Open Cup or Straw Cup?

Can a nine-month-old learn to drink from a cup?

Does your baby reach for your cup, only to spill most of the water onto their bib when it reaches their lips? This may be part of discovering a new skill. Cup drinking involves bringing the rim to the lips, managing a small sip, swallowing, and knowing when to pause.

The CDC explains that cups can be introduced around six months and that by nine months babies may begin learning to drink from an open cup. This does not mean a nine-month-old must manage a cup alone. Your help can gradually decrease as the skill develops.

Open cup or straw cup?

With an open cup, your baby can see the liquid move. At first, you can hold the cup and tip it slightly, offering only a little so water does not rush into the mouth. Choose a lightweight, shatter-resistant cup with smooth edges.

A straw cup uses a different drinking movement. Not being able to use a straw immediately is not a developmental failure. The CDC says a straw or training cup can be offered from around six months. You can try both types at different meals.

The CDC lists open cups, training cups, and straw cups as options for learning to drink. A cup with a spill-proof valve is not essential; you can offer an open or straw cup and let your baby practise gradually.

What might happen on the first attempts?

In the early days your baby might grab the cup with both hands, lift its bottom, or dip a finger into the water. They may lose interest after a sip or two. Exploring the cup and movement matters more now than finishing a drink independently.

For example, at lunch you could put a little water in a cup and bring its rim to your baby's lips. If they turn away or close their mouth, end the attempt. Spilled water is an ordinary part of learning; calm repetition is enough.

What is a safe position for cup drinking?

Offer the cup while your baby can hold their head steady and sit upright with good support. Use the high-chair harness and stay nearby. Choose a calm mealtime rather than pouring water into the mouth while the baby is lying down or moving.

If water flows too quickly, tilt the cup back and allow your baby to set the pace. Stop and discuss repeated coughing, apparent choking, or difficulty swallowing with your pediatrician. Inability to breathe or blue coloring requires emergency help.

What can you put in the cup?

Plain water is a suitable first choice for cup practice at nine months. Offer a few sips with meals rather than setting a drinking target. CDC guidance gives about 4–8 fl oz (120–240 mL) of water a day for ages 6–12 months; it is not a requirement to finish a cup.

Breast milk or suitable infant formula remains the main drink until the first birthday. Water should not replace milk feeds. Juice and sweetened drinks are unnecessary for learning to use a cup; the CDC advises against juice before 12 months.

What if your baby does not want to use a cup?

If your baby chews the straw, pushes away the open cup, or treats it as a toy, simply try again later. A calm mealtime when they are not exhausted may work better. Watching you take a sip can help them understand the movement.

Do not turn cup use into an age-based test. It is common for you to hold the drink at nine months. The CDC also describes drinking from an open cup while an adult holds it around 12 months; independent control develops gradually.

What should you look for when choosing and cleaning cups?

You do not need a special brand or complicated mechanism. Choose something easy to hold, shatter-resistant, smooth-edged, and easy to clean. If you choose a straw cup, removable straw and lid parts help thorough cleaning.

There is no need to make cup practice into constant sipping in the stroller or in bed. Make it a short part of mealtimes instead, so you can watch your baby's response and follow their pace.

What can you do today?

At one meal today, add a little water to the bottom of a small unbreakable open cup. With your baby upright, support the cup with both hands, bring its rim to the lips, and pause after a few sips. If interest continues, try once more. Introduce a straw cup calmly another time if you wish.

If your baby pushes the cup away, there is no need to insist. Water on the bib, little hands trying to hold on, and brief attempts are normal parts of learning. The aim is a safe, pleasant drinking experience.