Glass baby bottles let you see the milk, clean easily and do not hold smells, but they are heavier and can break; silicone sleeves help. Stainless steel bottles are light and nearly unbreakable, good for older babies and travel, but you cannot see the level. Nipples are usually silicone either way. Follow your pediatrician's advice and the maker's sterilizing instructions.
Bottles get heated, washed and sterilized many times a day, so the material matters.
Compared
| Glass | Stainless steel | |
|---|---|---|
| Weight | Heavier | Light |
| Breakage | Can break; sleeves help | Very durable |
| See the milk | Yes | No |
| Heating | Even, fast | Slower |
| Cleaning | Easy, no odors | Easy, no odors |
| Best for | Home feeding | Travel, older babies |
Safety tips
- Check glass for chips and cracks before each feed.
- Use a silicone sleeve for grip and protection.
- Never microwave bottles.
- Replace nipples regularly.
Beyond bottles
Stainless steel plates and cups and wooden toys round out a low-plastic nursery. See the first swaps to make and silicone safety. Browse baby and kids.
Related guides
Common questions
Can glass bottles be sterilized?
Most can be boiled, steamed or put in the dishwasher. Avoid sudden temperature changes and check for chips before each use.
Can I warm milk in a steel bottle?
Steel warms in a water bath or bottle warmer, more slowly than glass. Never microwave bottles.
What are nipples made of?
Usually silicone, sometimes natural rubber. Replace them when they crack, thin or change shape.