How to Choose the Right Baby Feeding Bottle for Your Baby’s Age

Growing with Your Baby

It feels like only yesterday you were holding them for the first time, marveling at their tiny fingers. Now, in what feels like the blink of an eye, they are already outgrowing their first onesies and their feeding bottles, too.

Learning how to choose the right baby feeding bottle isn’t a one-time decision. It’s a journey that changes as your baby grows, their tummy expands, and their feeding habits evolve. From those first delicate newborn sips to the confident gulps of an active six-month-old, choosing the right feeding bottle size and teat flow is key to a happy, satisfied, and well-rested baby.

This guide will walk you through how to choose the right baby feeding bottle by age, so feeding time stays calm, comfortable, and stress-free.

1. The Newborn Stage (0–3 Months): Tiny Tummies & Gentle Sips

During the first few weeks, your baby’s stomach is very small, starting around the size of a marble and slowly growing to about the size of a large egg. This means small, frequent feeds are normal, and choosing the right feeding bottle really matters.

The Feeding Bottle Size

When learning how to choose the right baby feeding bottle for a newborn, smaller sizes are best. Stick to 120ml–150ml feeding bottles, such as the Bébèconfort Natural Comfort Set or Philips Avent 125ml options. These sizes are easier to handle during night feeds and help avoid overfeeding or wasting precious breastmilk or formula.

The Teat Flow

Always start with a Slow Flow (Level 1) teat. Newborns are still mastering the suck–swallow–breathe rhythm, and a fast flow can cause choking, gas, or discomfort. Feeding bottles with teats shaped like the breast help create a smoother transition, especially for breastfed babies.

2. The Infant Stage (3–6 Months): The “Hungry & Alert” Phase

Around three months, babies become more alert—and noticeably hungrier. Their growing appetite means they can take in more milk per feed, which often leads to longer sleep stretches.

The Feeding Bottle Size

At this stage, how to choose the right baby feeding bottle means sizing up. 240ml–260ml feeding bottles (such as Lansinoh Twin Packs or Tommee Tippee 260ml) are ideal for supporting their increased milk intake.

The Teat Flow

Most babies are ready for a Medium Flow (Level 2) teat. If your baby becomes fussy during feeds, takes longer than 20 minutes to finish, or seems frustrated, it’s usually a sign that the flow is too slow. Adjusting the flow can make feeding time much smoother.

3. The Active Baby (6 Months+): Big Appetites & Busy Days

By six months, your baby is likely sitting up, moving around, and maybe even starting solids. Their energy needs increase, and so does their milk intake.

The Feeding Bottle Size

For bigger feeds, 330ml feeding bottles are incredibly practical. Wide-neck options like the Mom Easy Twin-Pack are perfect for morning feeds or bedtime feeds that help keep your baby full for longer.

The Teat Flow

Most babies at this stage handle Fast Flow (Level 3 or 4) teats comfortably. When choosing the right feeding bottle flow, watch how confidently your baby drinks—fast flow allows them to feed efficiently and get back to exploring their world.

Pro Tips: How to Choose the Right Baby Feeding Bottle Flow

Not all babies follow age guidelines exactly, and that’s completely okay. Understanding how to choose the right baby feeding bottle also means watching your baby’s cues.

The flow may be TOO FAST if:

• Your baby coughs, gags, or gulps
• Milk leaks from the sides of their mouth
• They pull away from the feeding bottle while feeding

The flow may be TOO SLOW if:

• The teat collapses during sucking
• Your baby becomes frustrated or cries mid-feed
• Feeds take too long, or your baby falls asleep from exhaustion

Conclusion: A Happy Belly Means a Happy Baby

At the end of the day, no guide knows your baby better than you do. While age-based recommendations help, the real secret to how to choose the right baby feeding bottle is paying attention to your baby’s comfort and feeding behavior.

The right feeding bottle size and flow can reduce gas, minimize colic, and turn feeding time into a calm, bonding experience instead of a struggle. When your baby feels full and comfortable, everyone sleeps better.

👉 Ready to choose the right baby feeding bottle for every stage? Shop feeding bottles by age and stage at Tash Baby Store today!