Different Types of Milk Bottles

Glass bottles are always my first choice as well as my sister’s first choice when it comes to feeding our babies. We have used glass bottles till our child reaches 18 months of age. Since young, our parents have educated us on how plastic can be harmful and why my mom chose to breastfeed us and used glass bottles on us. Our knowledge about milk bottles increased when I started my baby business.

Even though there is a lot of news and articles on how harmful plastic can be and the importance of BPA Free, unfortunately I still do see some parents passing down their used milk bottles (I’m talking about those that have been used for few months and some even years) to their family or friends.

Customers came over to ask me to talk to their parents about boiling plastic milk bottles etc..
Extract from AVA : *Do not put boiling water in baby bottles, as hot water causes bisphenol-A to migrate out of the bottle at a higher rate.* 

So I have decided to compile the different type of milk bottles.


Milk bottles can be differentiate into PES, PP, PPSU and GLASS

Before I go into details of the bottles, it’s important to know what excatly is BPA Free.
BPA stands for Bisphenol A. BPA is an industrial chemical that has been used to make certain plastics and resins since the 1960s. Is a chemical that had been used to harden plastic. Some research shown that BPA can seep into food or beverages from containers that are made with BPA. exposure of BPA is a concern because of possible health effects of BPA on the brain, behavior and prostate gland of fetuses, infants and children.
Although FDA, has said that BPA is safe at the very low levels that occurs in some food but they are still continue its review and research of BPA.

PP Milk Bottles

PP (Polypropylene), tough and flexible. Can only withstand temperature up to 120°C. A plastic mainly used in household items, reasonably economical. It’s transparent or can be colored using pigments. PP milk bottles will loose their transparency over time and frequent sterilization or boiling. Limited shelf life. Advised to change every 5-6 months, or where there is change in texture. Most commonly use milk bottles in the market.

PES Milk Bottles

PES (Polyethersulphone), describes the family of thermoplastic polymers. These polymers are known for their toughness and stability in high temperatures. The size change when exposed to boiling water of 180°C.  Is a new plastic to replace BPA. PES bottles has a natural honey-coloured tint. Advised to change every 5-6 months, or where there is change in texture.

PPSU Milk Bottles

PPSU (Polyphenylsulfone)is high performance thermoplastic offering better impact resistance and chemical resistance than PP and PES. It can withstand continuous exposure to heat and still absorb tremendous impact without cracking or breaking.Commonly use in aerospace and medical devices which required repeated sterilization. It has high melting point of 207°C. It does not absorb odor or colour. Naturally BPA Free.
Can change yearly. More costly compare to PES/PP.

Glass bottles

Glass milk bottles have been around for many years and commonly used during our grandparents time. But it’s not widely used during our parents era onward because glass is heavier and may cause danger to parents or baby when we drop the glass bottles. But it’s the only milk bottles which doesn’t leach or released chemicals when exposed to heat. Melting point of 1400°C to 1600°C, depending on the components. No change needed unless you break the glass, or there is cracks.

Best Milk Storage choice

Many have argued that certain storage method is the best, but ultimately is the preference of the individual. Personally I use glass bottles to store my breast milk, and extra supply in breast milk storage bags due to space constraints. Even though till now I have not warm up any breast milk from my storage bags, but I prefer to pour out rather than warming it directly from the plastic.

Below is the extra from a journal paper regarding the recommended way of storing breast milk, extracted from  “The 3 M’s of Breast-feeding the Preterm Infant”

Several features should be considered when determining the optimal container used for milk storage, including size, need to recycle, ease of cleaning/sterilizing, protection of nutrients, bacteriologic considerations, and ability to connect directly to the pump flange. Studies measuring these factors conclude that glass and hard plastic (polypropylene) are the recommended choices for milk collection/storage.6,10,11 Plastic bags are a poor choice for milk storage for the hospitalized infant owing to their nonsterile condition, greater loss of fat (adherence to sides of bag), and difficulty in handling.

I hope this article is useful in helping you to clear your doubts on different types of milk bottles. 🙂

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Hi, I’m Qiqi. Thanks for stopping by! I started out blogging way back in 2004 about my modeling, pageant and everyday life. I stopped blogging for a period of time as life got busy with career, building my businesses and having my first child in 2011.

When I got back to blogging, with inspiration of my children, I’ve transformed my blog to be more informative for parents and spreading positive energy for ladies to feel great about themselves and their lives. Read more about me here.

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