When to Switch from Sippy Cup to Straw Cup: A Parent Guide
By Expert-Designed Baby and Toddler Feeding Products | Published: 2026-10-13
Category: How-to Guides
Most babies can start a straw cup around 6 to 9 months, and many move away from a sippy cup by 12 to 18 months. Here is an ordered plan with checkpoints and common mistakes.
Quick answer
Start offering a straw cup between 6 and 9 months, once your baby can sit upright with support and shows interest in your cup. Keep the sippy cup as a backup for a few weeks, then phase it out by 12 to 18 months. Add open-cup practice in parallel, because straw and open-cup drinking build different oral skills.
Why the order matters more than the age
A straw cup is not just a sippy cup with a different lid. Straw drinking uses lip rounding and a controlled suck-swallow pattern, while a hard-spout sippy cup often relies on biting and tipping. That is why the transition works best as a sequence: introduce the straw while the sippy cup is still familiar, then reduce sippy cup use once straw drinking is reliable. If you remove the sippy cup cold turkey, many babies simply drink less for a few days, which is the most common reason parents give up too early.
Set up the cup before you set up the schedule
Use a small, weighted cup so it stays put when tipped, and fill it with only a small amount of liquid. A short straw is easier for a beginner than a long one, and a clear cup lets you see how much your baby actually drinks. Offer the straw cup at a calm time, not when your baby is hungry enough to be frustrated by a new skill. The first sessions are practice, not nutrition.
How to read progress without over-measuring
Watch for lip closure around the straw, a steady stream of bubbles, and your baby returning to the cup after the first sip. Those signs matter more than the number of ounces in the first two weeks. If your baby coughs on every attempt, the flow may be too fast; if they chew the straw constantly, they may still be in the mouthing stage. Both are checkpoints, not failures, and both usually resolve with shorter, more frequent practice.
Your step-by-step switch plan
- Step 1: Check readiness signs: Look for sitting with support, steady head control, interest in your cup, and the ability to bring objects to the mouth. These signs usually appear between 6 and 9 months. Common mistake: starting because of a birthday rather than a skill. If two or more signs are missing, wait two weeks and reassess.
- Step 2: Introduce the straw cup alongside the sippy cup: Offer the straw cup once a day with a small amount of liquid, and keep the sippy cup available so total intake does not drop. Keep sessions short and calm. Checkpoint: your baby closes lips around the straw or produces bubbles within the first week or two.
- Step 3: Model straw drinking yourself: Take a sip from your own straw cup in front of your baby, then offer theirs. Imitation is often faster than instruction at this age. Common mistake: holding the cup for your baby the entire time. Let their hands rest on the cup so they build control.
- Step 4: Increase straw cup offers and reduce sippy cup offers: Move to two or three straw cup sessions a day, then replace one sippy cup session at a time. Keep the change gradual over two to four weeks. Checkpoint: your baby takes several consecutive sips without coughing or spilling most of the liquid.
- Step 5: Add open-cup practice in parallel: Use a small open cup with a tiny amount of liquid at meals while the straw cup handles most drinking. Open-cup drinking supports different oral skills than straw drinking. Common mistake: treating open cup and straw cup as either-or. Most babies benefit from practicing both.
- Step 6: Phase out the sippy cup: Once straw and open-cup drinking are reliable, stop offering the sippy cup at home. Keep one for travel or childcare only if it prevents a drop in fluids. Checkpoint: by 12 to 18 months, most toddlers can use a straw cup and an open cup as their main cups.
Products that support this transition
- Mini Cup + Straw Training System (5-Pack): Learning to drink from a straw is an important developmental milestone that develops lip rounding and promotes speech development. The Mini Cup + Straw teaches toddlers to drink from an open cup and safely learn to use a straw. This 5-pack covers both skills in one system, so you can practice straw drinking and open-cup drinking without buying separate cups.
- Baby-Led™ Tiny Cup: Learning to drink out of an open cup is an important developmental milestone, and the Baby-Led Tiny Cup helps baby transition from bottle to cup. Open cup drinking supports healthy oral and speech development, aids with teething, helps baby learn to have a strong swallow, and may help to prevent tooth decay. It can be used with breastmilk, formula, and purees. Use it for the open-cup half of the plan, and check with your pediatrician about any liquid or puree you are unsure about.
- Baby-Led™ Tiny Spoons: Learning to self-feed is an important developmental milestone, and the Baby-Led Tiny Spoon is designed to help baby learn how to feed independently, with a handle designed for baby-led self-feeding. Once cup drinking is steady, the same self-feeding practice carries over to meals and reduces the chance that cups become the only skill you work on.
