FAQ: Are Bottle Sterilizers and Warmers Safe?

By Kristie Turck •  Published 05/23/08 •  2 min read

Last updated on March 18th, 2009 at 08:44 pm

We’ve been asked a bazillion times whether bottle sterilizers and bottle warmers are safe, and the questions surrounding them are usually layered. Do they contain BPA? If so can using them on my BPA Free bottles do any harm?

Not many, but some bottle sterilizers and warmers do contain polycarbonate plastic. Our friends at Z Recommends recently published an article about bottle sterilizers and added them to their extensive BPA Report. Please read their post about bottle sterilization and for a short list of BPA Free sterilizers. Note that many sterilizers come packaged with polycarbonate bottles.

Bottle warmers fall into the same category and while they are handy (I’ve heard) we don’t recommend them on the Heat and Plastic don’t mix level. But since moms want to know what everything is made of these days, Safe Mama Resident Researcher Jamie (We love her!) got on it and came up with a short list of popular Bottle Warmers and their materials:

Munchkin Deluxe Auto Bottle Warmer: Polypropylene (#5) and other materials but does not contain polycarbonate (Note: These were recently recalled due to fire hazard)
The First Years Night and Day Bottle Warmer by Learning Curve: Polypropylene (#5) except buttons are polycarbonate
Phillips Avent Express Bottle & Baby Food Warmer: Polypropylene (#5)
Phillips Avent iQ Electric Bottle & Baby Food Warmer: Polypropylene (#5)

Things to keep in mind, as a general rule, us SafeMama’s don’t recommend using bottle sterilizers or bottle warmers in general. Heat and plastic are not our favorite combination and while they are conveniences, a little soap and water, or heating a fresh bottle in a glass container will do the trick without cooking your bottles.

Again, these are just recommendations and you, as parents, can judge whether you want to use these products.