Glass Baby Bottles: Benefits, Drawbacks & Tips for Newborns

Glass baby bottles were once the only option. Then lightweight plastic bottles took over, and for a few decades glass all but disappeared from the nursery. Today, more Australian parents are choosing glass again, mainly because it's durable, easy to keep clean and free from the plastics many families prefer to avoid.

But are glass baby bottles actually better? The honest answer is that they suit some families very well and others less so. This guide covers the real benefits and drawbacks of glass bottles, how they compare with plastic, silicone and stainless steel, whether they're a good choice for newborns, and how to use and sterilise them safely.

The benefits of glass baby bottles

• No plastic in contact with milk. Glass is inert, so it won't leach anything into milk or formula. Most plastic baby bottles sold in Australia have been BPA-free since a voluntary industry phase-out around 2010, but some parents still prefer to avoid plastic altogether, and glass is the simplest way to do that.
• Doesn't stain or hold smells. Glass won't cloud, discolour or absorb the smell of milk over time, so bottles look and smell clean for longer.
• Easy to clean and sterilise. The smooth surface doesn't scratch easily, which means fewer places for milk residue to cling. Glass also handles boiling and steam sterilising without warping.
• Long-lasting. Looked after well, a glass bottle won't wear out the way plastic can, so it can last through several babies. You'll still need to replace teats regularly.
• Recyclable. When a glass bottle does reach the end of its life, the glass can be recycled.

The drawbacks to consider

• Heavier. Glass bottles weigh more than plastic, which matters in a nappy bag and once your baby starts holding their own bottle.
• Can break. Dropped on a hard floor, glass can chip or shatter. A silicone sleeve adds grip and protection, and is well worth using.
• Gets hot to the touch. Glass transfers heat, so a bottle of warmed milk can feel hotter on the outside than plastic. Always test the milk temperature on your inner wrist.
• Usually costs more. Glass bottles tend to cost more upfront, although they often last longer.

Glass vs plastic vs silicone vs stainless steel bottles

There's no single "best" material. Many parents use glass at home, where weight and breakage matter less, and a lighter plastic or silicone bottle for outings and daycare.

Are glass bottles good for newborns?

Yes. Glass bottles are a perfectly good choice from birth. For newborns, the teat matters more than the bottle material: look for a slow-flow newborn teat that suits your baby's feeding, and expect to try a couple of options before finding the right fit.

A smaller bottle, around 120–150ml, is the most practical size for newborn glass feeding bottles. It's lighter to hold during night feeds and matches the smaller amounts young babies drink. You can move up to a larger bottle as feeds increase.

If you're combining breastfeeding and bottle feeding, our guide to choosing the right baby bottle for your newborn covers teat shapes and flow rates in more detail.

How to use glass baby bottles safely

• Check for damage before every feed. Look for chips or cracks, especially around the rim and base, and replace any damaged bottle straight away.
• Use a silicone sleeve. It improves grip and helps protect the glass if the bottle is dropped.
• Avoid sudden temperature changes. Moving a bottle straight from the fridge into boiling water, or from hot to very cold, can stress the glass. Let it adjust gradually.
• Don't warm milk in the microwave. Microwaves heat unevenly and can create hot spots in milk, whatever the bottle is made of. A bottle warmer or warm water bath is safer.
• Supervise feeds. Once your baby starts holding their own bottle, stay close and switch to a lighter bottle or cup if drops become frequent.

How to clean and sterilise glass bottles

Wash glass bottles in hot soapy water with a bottle brush straight after each feed, then rinse well. To sterilise, you can boil the bottles, or use an electric steam steriliser. Glass handles both well. Always follow the manufacturer's instructions for your bottle and teats, and see our guide on whether you need to sterilise baby bottles for how long to keep sterilising.

When to move on from bottles

Most babies start learning to drink from a cup from around 6 months, and many parents aim to phase out bottles at around 12 months. A sippy cup or straw cup makes the transition easier.

Frequently asked questions

Are glass baby bottles better than plastic?
Glass bottles don't contain plastic, don't stain or hold smells, and last longer. Plastic bottles are lighter, cheaper and won't break. Neither is "better" for every family, so it comes down to what matters most to you.

Are glass baby bottles safe?
Yes, when used carefully. Check bottles for chips or cracks before each use, use a silicone sleeve for extra protection, and avoid sudden temperature changes.

Can you put glass baby bottles in the dishwasher?
Many glass bottles are dishwasher safe, but teats and other parts may not be. Check the manufacturer's instructions for your bottle.

Do glass bottles keep milk warm for longer?
Glass holds heat a little better than thin plastic, but it isn't insulated. If you need to keep milk warm on the go, an insulated bottle carrier or portable bottle warmer is more reliable.

How often should I replace glass baby bottles?
Replace a glass bottle as soon as it's chipped or cracked. Teats should be replaced regularly, as soon as they show signs of wear, whatever the bottle is made from.

Shop baby bottles at Baby Central

Browse our Mininor Glass Baby Bottle and our full range of baby bottles and teats, plus bottle warmers, sterilisers and cleaning accessories to make feeding easier.