Most babies should start transitioning away from the bottle around 6 months of age, with the goal of being completely done by 12 months. The American Academy of Pediatrics recommends offering a cup for the first time when your baby starts eating solid foods, typically around 6 months, and gradually phasing out bottles from there. If your child is still using a bottle well past their first birthday, the risks to their teeth, nutrition, and development start to add up.
The Ideal Timeline
The transition from bottle to cup isn’t a single event. It’s a gradual process that works best when spread over several months. Around 6 months, you can introduce a cup with a few ounces of water during one meal a day. This gets your baby used to the feel and mechanics of drinking from something other than a bottle, with zero pressure to perform.
By about 10.5 to 11 months, try putting all of your child’s milk or formula into cups instead of bottles. That gives them a few weeks to adjust before their first birthday. The 12-month mark matters because that’s roughly when children start forming emotional attachments to their bottles, making the transition harder the longer you wait.
Why 12 Months Is the Cutoff
Keeping a bottle past age one isn’t just a habit issue. It carries measurable health risks. A study of young children found that prolonged nighttime bottle use (24 months or longer) nearly tripled the risk of tooth decay. The problem is especially bad with nighttime bottles, where milk or formula pools around the teeth for hours while a child sleeps.
There’s also a nutritional cost. Research on children at nutrition assistance sites found that continued bottle use was significantly associated with both iron deficiency anemia and obesity. The mechanism is straightforward: toddlers who carry a bottle around tend to sip milk or sweet liquids throughout the day. That fills them up with calories from liquid while crowding out iron-rich solid foods they need at this stage. In one study, 63% of the children surveyed were still receiving daily bottles of milk or sweet liquids well past the recommended age.
How to Wean Gradually
Going cold turkey works for some families, but a gradual approach tends to be smoother. Start by picking the feeding your child cares about least, often a midday bottle, and replace it with a cup. Keep that routine for a few days before dropping the next one.
If your child currently gets three bottles a day, cut to two. Once that feels normal, cut to one. The bedtime bottle is usually the last to go and the hardest to give up, so save it for the end. A helpful rule during the transition: bottles and cups are only for mealtimes and bedtime (not in bed), and everywhere else your child drinks from a regular cup.
If your baby is also switching from formula to whole milk around the same time, you can tackle both changes together. For babies who take to cow’s milk easily, start offering 2 to 4 ounces of milk for every two or three servings of formula, increasing milk and decreasing formula over a week or so. For pickier babies, mix a small amount of milk into prepared formula and gradually shift the ratio. In a 4-ounce serving, for example, start with 3 ounces of formula and 1 ounce of milk, then adjust from there. Whole milk is generally recommended until age 2 because toddlers need the extra fat for growth and brain development. If dairy is off the table, fortified unsweetened soy milk is the primary alternative that meets a child’s nutritional needs.
Choosing the Right Cup
Not all cups are created equal when it comes to your child’s oral development. Sippy cups with hard spouts are the most popular first step, but they encourage the same sucking motion as a bottle. Prolonged use can affect the muscles involved in speech and eating.
Straw cups are a better option for oral development. Drinking through a straw uses a motion closer to regular cup drinking and helps build the muscles your child needs for solid foods and eventually for clear speech. Open cups are the gold standard. They teach your child to control the flow of liquid, coordinate swallowing, and use both hands, all skills they’ll rely on for the rest of their life. Yes, there will be spills. Start with small amounts of water during meals and expect a learning curve.
A practical progression: introduce a straw cup or open cup around 6 months with water at meals, use it to replace bottle feedings between 9 and 12 months, and aim to retire sippy cups with spouts before age 2.
Signs Your Baby Is Ready
The AAP ties cup readiness to the start of solid foods, which is its own set of milestones. If your baby can sit upright with support, shows interest in what you’re eating, and can bring objects to their mouth, they’re likely ready to try a cup with help. Most babies hit this window around 6 months.
You don’t need to wait for your child to “ask” for a cup or show some dramatic sign of readiness. The earlier you introduce one, the more natural it feels to them. Babies who start practicing at 6 months generally have an easier time dropping bottles by 12 months than those who first see a cup at 10 or 11 months. If your child has a motor skill delay or chronic health condition, the timeline may look different, and a pediatrician can help you adjust the schedule to match your child’s abilities.
What If You’re Already Past 12 Months
If your toddler is 14, 16, or 18 months old and still on a bottle, don’t panic, but do start the transition now. The dental and nutritional risks increase with time, and the emotional attachment only deepens. Pick a start date, remove bottles from sight, and offer milk in a cup at meals. Some parents find it helps to let the child “give away” their bottles or put them in a box together as a ritual.
Expect a few rough days. Toddlers may drink less milk initially, which is normal. Most children adjust within a week. If your toddler is drinking enough water and eating a varied diet with dairy or calcium-rich foods, a temporary dip in milk intake won’t cause harm. The goal is forward momentum, not perfection on day one.