Most babies can start using a sippy cup around 6 months old, right when they begin eating solid foods. The American Academy of Pediatrics recommends offering a cup at this stage, and by 12 months, most children can hold one with two hands. But the type of cup you choose matters more than many parents realize, and the goal is actually to move past the sippy cup fairly quickly.
Signs Your Baby Is Ready
Age alone isn’t the only factor. Your baby needs a few physical skills in place before a cup makes sense. The key readiness signs are sitting up independently, holding objects steadily with both hands, and bringing things to their mouth with decent coordination. Most babies hit these milestones around 6 months, though some take a bit longer.
Curiosity matters too. A baby who grabs at your water glass or reaches for objects and explores them is showing the cognitive readiness that supports learning to drink from something new. If your baby can transfer a toy from one hand to the other, their arm and hand coordination is likely developed enough to manage a lightweight cup with help.
The Timeline From 6 to 18 Months
The transition from bottle to cup isn’t a single switch. It unfolds over roughly a year, with each stage building on the last:
- Around 6 months: Introduce a sippy cup or straw cup with breast milk or formula. Expect more playing than drinking at first.
- Around 9 months: Babies can start learning to drink from a cup without a lid, held by a parent. Straw drinking can also be introduced or refined at this age.
- Around 12 months: Most children can hold a cup with two hands and are ready to phase out bottles entirely.
- By 18 months: Independent open-cup drinking, while still messy at times, should be part of your child’s routine.
Start by putting whatever your baby already drinks (formula or breast milk) into the cup. This keeps the experience familiar while changing only the delivery method. As they get comfortable, you can offer plain water in the cup at mealtimes too.
Why the Type of Cup Matters
Not all training cups work the same way for your baby’s development. Hard-spouted sippy cups with no-spill valves require a sucking motion almost identical to bottle feeding. That’s convenient for your floors, but it can work against what your baby’s mouth needs to learn next.
Between 6 and 12 months, babies are supposed to transition from a “suckle-swallow” pattern to a mature swallow, where the tongue tip lifts to the upper gum ridge and initiates a wave-like motion. This tongue elevation is essential for handling advanced food textures and, later, for producing certain speech sounds. A hard spout or bottle nipple sits over the front third of the tongue, physically blocking that upward movement. When a tongue can’t elevate regularly, it tends to rest low and forward in the mouth, which can delay both feeding development and speech.
Speech-language pathologists generally recommend straw cups over hard-spouted sippy cups. A straw still allows the tongue to elevate while drinking. One useful technique: once your child gets the hang of straw drinking, trim the straw short so the tip barely reaches the tongue when their mouth closes around it. This encourages even more tongue elevation during swallowing.
Open cups, held by a parent at first, are another strong option. They teach sipping rather than sucking from the start. The tradeoff is mess, but the developmental payoff is real.
Protecting Your Baby’s Teeth
Sippy cups can contribute to early childhood cavities if they’re used the wrong way. The risk comes from frequent, prolonged exposure of teeth to sugary liquids, including formula, milk, and fruit juice, all of which contain natural sugars. When a child walks around sipping from a sippy cup throughout the day, their teeth are essentially bathed in sugar for hours.
A few guidelines keep this risk low. Only fill sippy cups with plain fluoridated water between meals. Serve milk at mealtimes and in limited portions, since even milk delivers extra calories and cavity risk when sipped constantly. Juice should be avoided entirely in cups for infants. If you choose a training cup, pick one without a no-spill valve. Beyond the speech benefits, valveless cups encourage sipping rather than prolonged sucking and help your child learn a more mature drinking pattern faster.
Ear Infection Concerns
There’s some evidence that the sucking mechanism used with bottles and certain cups may affect ear health. Research has shown that the suction created during bottle feeding generates negative pressure in the throat and, subsequently, in the middle ear. This negative pressure could potentially cause secretions to flow backward into the middle ear cavity, triggering inflammation. While the connection between sippy cups specifically and ear infections hasn’t been firmly established, cups that require a strong suck (like no-spill sippy cups) could theoretically produce a similar effect. Straw cups and open cups don’t create the same vacuum pressure, giving them another practical advantage.
Making the Switch Easier
Most babies won’t take to a cup immediately, and that’s normal. Offer it at one meal a day to start, without any pressure. Let your child hold it, chew on it, tip it over. The goal at 6 months is familiarity, not volume.
Keep bottles for the feeds that matter most to your baby (usually morning and bedtime) while gradually replacing other feeds with cup offerings. Some children take to a straw cup immediately but reject a sippy cup, or vice versa. Try a few styles before deciding your baby “won’t take a cup.” Temperature can matter too: some babies prefer room-temperature liquids in a cup even if they’re used to warm bottles.
Continue breastfeeding or offering formula until at least 12 months regardless of how cup training is going. The cup isn’t replacing nutrition at this stage. It’s building a skill your child will need when bottles are phased out. By the first birthday, you’re aiming for cups to be the primary drinking vessel, with bottles fully retired shortly after.