Transitioning from a bottle to a sippy cup is an exciting milestone, but it can also feel a little daunting for both parents and babies. Whether you’re ready to ditch the bottle or just want to introduce a sippy cup alongside breastfeeding or bottle feeding, a gentle and patient approach can make all the difference. Here’s what you need to know to make the switch smoother — including how to properly warm breastmilk so your baby gets all the important nutrients.
When to Start Transitioning
The American Academy of Pediatrics (AAP) recommends introducing a sippy cup around 6 months of age. By this age, babies are usually starting solid foods and developing better motor skills, making it a good time to start experimenting with a cup.
You don’t need to rush — most babies are ready to completely transition off the bottle between 12 and 18 months. The key is to go at your baby’s pace while providing plenty of opportunities for practice.
Choosing the Right Sippy Cup
There are several types of sippy cups, and every baby has their own preference. You may need to try a few different styles before finding the right fit.
Here are the most common types:
Spout cups – Soft or hard spouts are available. Soft spouts may be easier for babies transitioning from a bottle.
Straw cups – These encourage proper oral muscle development and are often easier for babies who struggle with spouts.
Open cups – Small open cups (like shot-glass sized) can help babies develop drinking skills without a spout.
360 cups – These allow babies to sip from any side of the cup without spilling.
💡 Pro Tip: Start with a soft spout or straw cup first if your baby is used to nursing or bottle-feeding, as it mimics the familiar sucking motion.
Introducing the Sippy Cup
1. Start Slowly
- Begin by offering the sippy cup with small amounts of breastmilk or water during mealtimes.
- Let your baby explore the cup at their own pace — it’s okay if they mostly play with it at first.
- Show them how to tip the cup or use the straw by demonstrating it yourself.
2. Combine With Familiar Feeding Times
- Try offering the sippy cup after a feeding when your baby isn’t too hungry or frustrated.
- You can also try giving a small amount of breastmilk in the sippy cup while you’re holding or comforting your baby to make the transition feel more secure.
3. Gradually Replace Bottle Feedings
- Once your baby starts getting the hang of the sippy cup, begin replacing one bottle feeding per day with a sippy cup.
- Start with a midday or snack-time feeding since babies are often more receptive when they aren’t overly tired or hungry.
Warming Breastmilk for a Sippy Cup
Breastmilk can separate when stored in the refrigerator or freezer because the fat naturally rises to the top. It’s important to gently mix the milk before offering it in a sippy cup so your baby gets all the nutrients and calories.
How to Warm Breastmilk:
- Place the bottle or sippy cup with breastmilk in a bowl of warm water (not hot) for a few minutes.
- Gently swirl (don’t shake!) the milk to combine the fat.
- Test the temperature on your wrist to make sure it’s not too hot before offering it to your baby.
🚫 Avoid microwaving breastmilk — it can create hot spots and damage the milk’s nutrients.
Common Challenges (and How to Solve Them)
❌ Baby refuses the sippy cup – Try different cup styles or temperatures. Sometimes babies prefer breastmilk slightly warmer when drinking from a sippy cup.
❌ Milk leaks everywhere – Make sure the cup’s valve is properly secured. Straw cups and 360 cups tend to be more leak-proof.
❌ Baby chews on the spout instead of drinking – This is normal! Encourage gentle sucking by demonstrating how to drink from the cup yourself.
Encouragement and Patience Go a Long Way
Transitioning to a sippy cup is a learning process for both you and your baby. Some babies catch on quickly, while others need more time to adjust — and that’s perfectly okay. The goal isn’t perfection but helping your baby feel comfortable and confident with this new skill.
By warming and mixing breastmilk properly and offering a variety of sippy cup options, you’ll set your baby up for success. And remember, every sip (or even spill!) is a step toward independence.