What to look for in a baby bottle
Size: Bottles almost always come in more than one size. While the smallest size might look most appropriate for a newborn, it’s actually the teat flow that matters most. We’d recommend buying the next bottle size up because your baby will be drinking more milk before you know it, and you don’t want to have to replace the bottles too soon. Plus, it’s important to be sure that your baby is feeding till they’re properly full.
Teat and flow rates: Teats are typically made from either silicone or latex. You'll also find bottles with teats that aim to mimic breastfeeding. The three teat flow sizes (slow, medium and fast) are designed to stop a small baby guzzling and choking on milk coming out faster than they can swallow and larger babies from having to work too hard to suck milk out of a small hole. Many brands use approximate age ranges to label their teats, but only use these as a guide. Generally, if your baby takes longer than 20 minutes to finish a feed, falls asleep regularly while feeding or tugs at the teat while feeding, it may be a sign that they’re ready for the next teat size up.
Anti-colic features: These help to combat symptoms of reflux and colic, which can be very uncomfortable and distressing for both babies and parents. Typical anti-colic features found in baby bottles are slow-flow teats that help to slow the flow of milk and stop babies from swallowing extra air when they are colicky, vents in the bottle base that ensure air doesn't travel through the milk, valve systems that allow for better air flow, and angled bottle shapes to help a baby stay more upright when feeding, which will encourage paced bottle feeding.
Shape and bottle neck width: Does it look like it would fit comfortably in your hand and be easy for your baby to hold too, when ready? How wide is the bottle neck? If you’re combination feeding, a wide neck will stop late-night powder spillages. If you’re breastfeeding, you’ll want every drop of breast milk to be collected safely.
Volume markings: Are they clear and easy to read? This will become much more important at 4am – trust us.
Material: Most baby bottles are made from BPA-free plastic, which is safe for babies to suckle on. This type of plastic is light and easy to clean and also stands up well to repeated washing. Plastic baby bottles will end up in landfill once discarded, so there is also the option of non-plastic alternatives, like glass bottles, which are more hardwearing, environmentally-friendly and easier to clean. Just be aware that they are heavier, have more chance of breaking and are generally more expensive than plastic baby bottles.
What are the different types of baby bottle?
1. Natural feel
The WHO recommends that babies are exclusively breastfed for the first six months of their life and that breastfeeding continues where possible up to two years. Accordingly, bottle manufacturers invest a great deal of research into designing a teat that mimics breastfeeding as closely as possible, so you can express and bottle feed without nipple confusion.
All designs look a little different, but generally you should look for a soft silicone teat that your baby can latch onto without slipping off (if your baby doesn’t like the feel of silicone, NUK also make a latex version).
2. Anti-colic
Almost all bottles on the market include anti-colic features. One of the potential causes of colic and reflux is swallowing too much air during feeds, so bottle designers include venting systems to reduce the amount of air that gets into the milk as the baby drinks.
Bottles with ‘anti-colic’ in their names are likely to have a more intricate system to get that pesky air out of the way – usually straws, weights and valves that are a pain to clean but might help your baby feel more comfortable.
3. Angled
You might see some bottles on the shelf that have an off-centre teat or are otherwise designed with an angled appearance.
They’re designed to help the baby drink while being as upright as possible as there’s some evidence that pressure in the bottle creates negative pressure in the mouth, causing fluid build-up in the middle ear when lying flat. This could potentially lead to ear infections.
Keeping your baby upright should minimise this and angled bottles make the correct positioning easier.
4. Eco-friendly
As our plastic use comes ever more under the microscope, some manufacturers are trying to provide plastic-free alternatives for baby bottles. Many brands make a glass version of their plastic bestseller (Lansinoh and NUK among them) and a new wave of eco-friendly brands are also designing bottles in stainless steel.
The existing baby equipment system isn’t really set up to be compatible with these sustainable interlopers. They’re more expensive, you won’t be able to use a connecting breast pump or sterilise them in the microwave, and the volume markings are sometimes tricky to read. But, if you’re trying to do your bit for the planet, this might be a good place to start.
5. Transitional
Often this category of bottles overlaps with the eco-friendly category. They are bottles designed to last long after the baby years, to toddlerhood and often beyond.
Usually this means using the bottle with an alternative top – a sippy spout for a toddler and an adult bottle top for an older child, which you’ll probably need to buy separately. Bottles that can do this (Hegen, Twistshake and Pura Kiki, for example) tend to be made of tough, long-lasting materials – a fact often reflected in their price.
How much do baby bottles cost?
It varies tremendously between brands. Many plastic bottles are very competitively priced, especially if an online retailer is having a sale, so keep an eye out for useful deals.
Starter kits can also be a good way of getting more for your money, though look carefully at what’s included. If you don’t think you’ll use everything in there, it’s probably not good value for you. Generally, plastic bottles start at about £5 per bottle up to £20 t0 £30 for the higher-end luxe brands. Glass and stainless steel models will also be more, again between £20 to £30 per bottle.
How many bottles do I need for my baby?
Most lactation experts recommend six bottles in rotation for daily full-time feeding. However, if you’re combination feeding or just occasionally expressing, you’ll be able to get away with two to four, depending on how often you use them.
As a rule of thumb, buy how many bottles you think you’d need for a 12-hour period so you’re not constantly washing and sterilising them – life with a new baby is busy enough.
What makes a baby bottle safe?
First, check that the bottle has complied with the relevant EU safety legislation, EN:14350, which gives specifications for children’s drinking equipment. This can usually be found on the bottle box or the manufacturer’s website.
Plastic bottles should now be made from BPA- and BPS-free plastics – both chemicals can reportedly leach into food and drink and affect the body – which should also be obvious on the label.
Keep an eye on the silicone teats. If they degrade, get damaged or are bitten through, they’ll need replacing immediately so as not to present a choking hazard.
As you use the bottle, don’t put the teat on too soon after filling with boiling water. The build-up of pressure can squirt hot water out of the teat and present a hazard.
The small parts found in an anti-colic bottle should, of course, be kept out of baby’s reach.
How do I make up a bottle?
If you’re expressing breast milk into a bottle, it can be used to feed your baby immediately or stored for later use. The NHS says that breast milk can be kept in a fridge at 4°C or lower for four days (three days if you’re not sure what temperature your fridge is). It can also be frozen and kept for up to six months.
When defrosting breast milk, it’s best to do it slowly in a fridge – though, if you can’t wait, you can hold it under warm running water or put it in a jug of warm water. You can warm up fridge-cold milk the same way if your baby prefers it warm. Once defrosted, any leftovers can’t be kept for later or refrozen.
If you need to formula feed, boil fresh tap water and leave it to cool a little (no longer than 30 minutes) before pouring into the clean, sterilised bottle. Follow the manufacturer’s instructions exactly to add the right amount of powder, then put on the teat and lid and shake to combine. You can cool the bottle so it’s safe to drink by standing it in cold water or holding it under cold running water with the lid on. Don’t use bottled or reboiled water and don’t make up more than one feed at once.
How do I bottle-feed my baby?
After you’ve prepared a bottle and checked the temperature is safe (check it on your own wrist to make sure it’s not too hot), sit comfortably with them in your arms. The UNICEF UK Baby Friendly Initiative recommends that you “hold baby close in a semi-upright position so you can see their face, and reassure them by looking into their eyes and talking to them during the feed.” Sitting them upright also has the advantage of helping to prevent fluid build-up in the middle ear. Brush the bottle teat against their lips and let them suck on it when they open their mouth.
Keep an eye on the teat to make sure it’s always full of milk, not air (this helps prevent swallowing too much air, which can lead to reflux or colic). If the pressure in the bottle builds up so the teat goes flat, the NHS recommends inserting a little finger gently in the corner of your baby’s mouth to release it.
According, again, to the UNICEF UK Baby Friendly Initiative, “offering the bottle in response to feeding cues, gently inviting the baby to take the teat, pacing the feeds and avoiding forcing the baby to finish the feed can all help to make the experience as acceptable and stress-free for the baby as possible.”
After the feed (or halfway through if you prefer), sit your baby up and gently pat their back to bring up any wind.
Don’t forget to throw away any leftover milk and to clean the bottle afterwards.
How do I clean and sterilise a baby bottle?
According to the NHS, all baby equipment should be sterilised before use for the first 12 months to protect against infections.
After a bottle has been used, dismantle it and either handwash with hot soapy water or put it in the dishwasher if it’s labelled dishwasher-safe. If the bottle includes small parts, make sure they’re thoroughly cleaned before reuse. Make sure you wash your bottle after every use.
After rinsing, you can also sterilise the bottle parts using whatever method you prefer: cold water, microwave or electric steam. Some bottles (the MAM Easy Start, for example) have been designed to self-sterilise in the microwave. If so, follow the manufacturer’s instructions carefully.
Once sterilised, leave the bottles inside the steriliser until they’re needed and make sure you have clean hands when you assemble them.
Read next: The best sterilisers for baby bottles and feeding gear
When should I replace baby bottles?
There’s no official guidance about this, though manufacturers might advise how often to replace teats – usually every three months or so.
For the bottle itself, watch out for chips, cracks and discolouration that isn’t from lasagne night, all of which could present a danger or indicate that the material is damaged.
For the teat, check often for wear and tear, weakening patches or bitten-through ends, and replace as soon as you find any. As with all baby equipment, it’s much better to err on the side of caution.
Related: How to transition from bottle to cup
About the author
Jenny Wonnacott has been working as a Content Editor for Mumsnet since 2022 with a particular focus on pregnancy, child and baby care product guides, articles and reviews. As a mum of three, Jenny has extensive hands-on experience in all of the Mumsnet content she writes about. She is passionate about sourcing, testing and thoroughly researching the products which make every stage of parenting easier, from the best pregnancy pillow to the most reassuring baby monitor as well as top kids' toys, games and tech.
How we chose our recommendations
To help us find the best baby bottles, we started by thoroughly researching the products currently on the market.
We always start by getting product recommendations from the Mumsnet forums. These products have been tried and tested at home by parents in a variety of real life situations and, with over 7 million users, we know this is the best place to go to find out which bottles offer the best value for money.
We investigated design innovations and materials, scouring the market for cutting-edge new brands alongside old established favourites and bestsellers, using trusted review sites like Which? to review the latest testing scores.
We sourced expert advice from The UNICEF UK Baby Friendly Initiative and the NHS.
Finally, we narrowed down our list of choices to 15 testing candidates from a range of brands and price points.
How we tested
Bottle use is so subjective that what works with one baby might not work with another, so our tester Katrĩna, a mum of two, spent several weeks washing bottles repeatedly, filling them, sterilising them, and testing their solidity and safety.
She analysed instructions and online resources, and noted down information about materials and safety standards.
She filled each bottle with boiling water and timed how long they could be held comfortably, measured any squirting hot water from the teat due to pressure escaping
She dropped the bottles onto a hard floor to see whether they remained in one piece.
She scrubbed each one hard with a new sponge to see if any of the markings came off.
Following testing, all the products were scored on six areas: purchase and assembly, safety and stability, day-to-day usage, cleanliness, aesthetics and value for money.
Why you should trust us
All Mumsnet product reviews are written by real people after several weeks of strict testing. We work hard to provide honest and independent advice you can trust. We spend hours researching, speaking to parents, analysing data and listening to experts before we test out the products on our shortlist.
Transparency is really important to us and that's why we're always upfront about how we tested the products we recommend. There's no incentive for us to be lazy with our research or in our testing process. There's no reason for us to respond to pressure from retailers or brands trying to promote new products. It's actually quite the opposite and we think it's a good system, one that keeps us focused on making parents lives' easier.