Babies can start practicing cup drinking around 6 months old when solids begin, though most toddlers don’t manage independent sips with minimal spills until 18–24 months.
Getting a baby to drink from an open cup is a messy but important milestone. The American Academy of Pediatrics recommends offering a cup when solid foods start at 6 months, with the goal of completely transitioning off bottles between 12 and 18 months and finishing with sippy cups by age 2. Delaying significantly past that second birthday raises the risk of cavities and unhealthy weight gain. Here’s exactly what to expect at each age and how to make the shift work without the stress.
What Cup Drinking Looks Like at Every Age
The timeline is gradual. At 6 months, babies have enough head and neck control to sit up and take small sips from a cup held by a caregiver. By 9–12 months, many can hold a small open cup and take sips with some spilling. Between 12 and 14 months is the critical deadline to remove the bottle entirely. Most toddlers achieve consistent spill-free drinking between 18 and 24 months, though the AAP considers 24 months the absolute latest finish line for graduating to open cups.
| Age | What Baby Can Do | Key Action |
|---|---|---|
| 6 Months | Small sips with caregiver holding cup | Introduce open cup during meals |
| 6–9 Months | Sippy cup possible; frequent spills with open cup | Keep practicing daily |
| 9–12 Months | May hold cup and sip somewhat independently | Work toward bottle removal by 12 months |
| 10.5–11 Months | Ready for all milk/formula in cups | Move everything to cup feeding |
| 12 Months | Can use a cup with spills; bottle should be gone | Introduce whole cow’s milk as main drink |
| 12–18 Months | Cup drinking improves steadily | AAP recommends completing transition in this window |
| 18–24 Months | Minimal spills during independent drinking | Phase out sippy cups entirely |
| 2 Years | Ready for standard open cups | Maximum deadline for finishing transition |
How To Start: Step-by-Step
Begin with a small plastic or silicone open cup holding about 4 ounces, filled with just a little liquid. Seat your baby in a high chair or on your lap. Hold the cup for them at 6 months, letting them sip only a small amount. Once they show readiness — usually around 9–12 months — use the hand-over-hand technique: place your hands over your baby’s hands, guide the cup to their mouth, encourage an “ahh” sound to promote swallowing, and bring the cup back to the tray after each sip to prevent gulping. Count “one, two” and remove the cup to manage the flow. Once open-cup swallowing is successful, you can introduce a straw cup the same day.
For weaning, gradually reduce bottle or sippy frequency — drop from three sessions a day to two, then restrict to meals and bedtime only before cutting them entirely. At 12 months, switch from formula or breast milk to pasteurized whole cow’s milk as the main drink. Water can be offered with meals starting at 6 months, but skip juice entirely until after the first birthday.
Cups To Use and Cups To Avoid
The best cup by far is a small open cup with no lid — it teaches babies to form their lips around the rim and sip rather than suck. If you need a lid for mess control, pick a snap-on or screw-on free-flow lid. Avoid spill-proof cups with valves (like 360 cups) or any design that requires sucking to get liquid out, because they don’t teach intake regulation and can delay the transition. Check out our recommended cups for 8-month-olds for specific starter options that match these criteria.
Common Mistakes That Delay the Transition
The biggest error is waiting too long: delaying past age 2 increases the risk of tooth decay, feeding problems, and unhealthy weight gain. Another common mistake is starting only with sippy cups, which misses the chance to develop proper lip coordination — experts recommend beginning with an open training cup from the start. Overfilling causes immediate spills, so start with a tiny amount. And never let a toddler drink unsupervised from a full-size adult cup; always stay within arm’s reach during practice sessions.
FAQs
When should a baby stop using a bottle entirely?
The American Academy of Pediatrics recommends completely stopping bottle use between 12 and 18 months, with 12–14 months as the critical deadline. Waiting past 18 months makes the transition harder and raises health risks like cavities and overfeeding.
Can I give my 6-month-old water in a cup?
Yes. Once your baby starts solids at 6 months, small sips of water from an open cup offered with meals are fine. Water does not need to be boiled after 6 months in US households with safe tap water.
What’s the best first cup for a baby?
A small open cup made of plastic or silicone, holding about 4 ounces, is the best start. It teaches proper lip and tongue coordination for sipping. If you need a lid for travel, choose a free-flow snap-on lid rather than a valve-based spill-proof design.
References & Sources
- NHS. “Drinks and cups for babies and young children.” Guidance on introducing cups at 6 months and discouraging bottles after age 1.
- American Academy of Pediatrics (HealthyChildren.org). “Discontinuing the Bottle.” Official recommendations for bottle-to-cup transition timing and methods.
- Cleveland Clinic. “Say Goodbye to Bottles and Sippy Cups.” Age milestones, cup-type guidance, and common mistakes in the transition process.