Best Plastic-Free Baby Bottles
Bottles for formula and breastmilk feeding.
Why plastic matters here
The highest-stakes category on the site: research found polypropylene baby bottles release millions of microplastic particles per liter during formula prep, with hot water and sterilization multiplying release. Infants fed from PP bottles may have the highest microplastic exposure of any group. Glass and steel alternatives are mature and affordable - this swap is pure upside.
What to look for
- Glass or stainless body; the nipple will be silicone or natural rubber - that's unavoidable and fine for most
- Natural rubber nipples are the zero-silicone option (watch latex allergy)
- Check the collar/ring material - often plastic even on glass bottles
- Silicone sleeves solve the glass-drop problem
- Compatibility with pumps/warmers is a real constraint for parents
Our picks
Pura Kiki
The only mainstream bottle where even the collar is stainless steel, so no polypropylene ring hides behind "glass." Body and ring are 18/8 steel; only the nipple, sleeve, and travel cap are medical-grade silicone. One body swaps to a sippy or straw top, so it grows with the child.
The pick for parents avoiding BOTH plastic and silicone in the soft part: a 100% natural rubber nipple with the anti-colic valve molded in (no plastic vent inserts) on a borosilicate glass body. Only downside is a polypropylene screw ring - otherwise it would be plastic-free.
A 304 steel band plus a silicone nipple converts any regular-mouth glass mason jar into a bottle - liquid touches only glass, steel, and silicone. Cheap, replaceable jars and a steel band instead of a plastic collar.
Borosilicate glass in a grippy silicone sleeve, sold everywhere and easy to convert to a sippy. Just know the cap, ring, and stopper are polypropylene and do touch the milk path - so it's a step behind the steel and mason options.
Considered, but not picked
Popular options that look plastic-free but aren't — and why.
Natursutten Anti-Colic Glass Baby Bottle
Beautiful glass body and a 100% natural rubber nipple, but the anti-colic double valve is polypropylene and sits directly in the milk path, along with a PP screw ring and cap. The plastic vent-in-the-flow is exactly the failure mode we flag, so it lands at minimal-contact despite the rubber nipple. HEVEA does the natural-rubber approach with less plastic contact.
Dr. Brown's Natural Flow Options+ (glass)
Marketed as a glass, BPA-free anti-colic bottle, but its signature feature is a multi-piece internal vent system - insert, reservoir tube, and travel disc - made of (BPA-free) polypropylene that sits INSIDE the bottle, submerged in the milk. That is more plastic-in-contact surface than almost any other glass bottle, and the parts must be scrubbed and sterilized constantly. The glass body doesn't rescue a plastic vent sitting in the milk. Skip for anyone minimizing plastic contact.
Philips Avent Natural (glass)
A glass version exists, but the screw ring/collar that seats the nipple is plastic, and Philips' own support page describes the "gap between the glass and the plastic screw ring." Plastic in the milk-adjacent seal on a bottle sold as the glass upgrade - the Pura steel collar or a mason band avoids this.
Evenflo Classic Glass
An inexpensive, genuinely glass classic - but the standard cap and nipple collar/ring are plastic, and modern sets ship a plastic ring plus silicone nipple. Fine and affordable, but the plastic ring in the milk path keeps it out of the top picks; the mason-jar or steel systems do the same job without a plastic collar.
Other reviewed products in this category
Related: Sippy Cups & Toddler Cups · Kids Plates & Bowls