7 Best Baby Bottles: Glass & Silicone Review & Flow Rate Test

Choosing the right baby bottle can feel overwhelming for new parents. This review cuts through the confusion by rigorously testing seven popular glass and silicone baby bottles, focusing on flow rate, ease of use, and overall design. We conducted a scientific flow rate test using a Medela breast pump to objectively compare each bottle's dispensing speed, providing crucial data for parents seeking the optimal feeding solution for their little one's developmental stage. This detailed analysis considers factors beyond just flow rate, encompassing factors such as ease of cleaning, leak resistance, and overall user-friendliness.Our comprehensive review evaluates each bottle's performance across multiple criteria, helping you navigate the various options available. From the slowest flow rates ideal for newborns to faster options for growing babies, we've analyzed the strengths and weaknesses of each bottle. This allows you to make an informed decision based on your baby's specific needs and your own preferences. Discover which bottles excelled in our flow rate test and which ones fell short, ultimately saving you time and ensuring a smoother feeding experience.

Pros And Cons

BB Baby Glass Bottle
  • Beautiful design
  • Easy one-handed lid opening
  • Precise liquid measurement increments
  • Includes bottle cap for airtight transport
  • Includes collapsible funnel
  • Nipple doesn't hold back liquid well when inverted
Tommee Tippee Glass Baby Bottle
  • Larger size
  • Nice lid design for easy one-handed opening
  • Softer, thinner silicone nipple
  • Nipple doesn't hold back fluid when inverted
  • Air re-enters bottle through nozzle, potentially causing foamy fluid
Philips Avent Glass Natural Baby Bottle
  • Simple and reliable
  • Sturdy
  • One-handed opening (though tight)
  • Easy to clean and assemble
  • Holds back liquid well when inverted
  • Slow flow rate, good for newborns
  • Lid is a little tight
Hakka Gen 3 Natural Glass Baby Bottle
  • Beautiful design
  • Lid pops off easily
  • Economical feeding position
  • Wide glass bottle opening, easy to clean
  • Doesn't hold back liquid perfectly when shaken vigorously

Read more: 5 Best 8 oz Baby Bottles

Flow Rate Test Methodology

To ensure a fair comparison, I conducted a flow rate test using a Medela Swing breast pump set to the highest level in Deep Suction mode. Each bottle and nipple combination underwent a one-minute test, and the difference in weight before and after measured the dispensed fluid.

Medela Swing breast pump used in the flow rate test
Medela Swing breast pump used in the flow rate test

I modified the milk collector with a silicone collar for better sealing and created an SM cutle to prevent vent blockage. The tests were conducted repeatedly in a random order to eliminate pump-related variations and guarantee consistent results.

Modified milk collector with silicone collar
Modified milk collector with silicone collar

This rigorous approach ensured an accurate and objective comparison of the flow rates across different bottle and nipple combinations, providing valuable data for parents seeking optimal feeding solutions.

Illustration of the random testing pattern
Illustration of the random testing pattern

Flow Rate Results & Newborn Considerations

The flow rates varied significantly across the bottles tested. The E4 silicon-coated glass bottle (90mm) had the slowest flow rate at 2.3 ml per minute, followed closely by the Philips Avent glass bottle (5.2 ml/min).

Chart showing the flow rate results for all bottles tested.
Chart showing the flow rate results for all bottles tested.

These slower flow rates are ideal for newborns, closely mimicking breastfeeding pace. However, as babies grow, higher flow rates become necessary.

E4 silicon-coated glass bottle
E4 silicon-coated glass bottle

The remaining bottles exhibited a range of flow rates catering to different infant developmental stages. This highlights the importance of selecting the right bottle and nipple based on the baby's individual needs.

Philips Avent glass bottle
Philips Avent glass bottle

Philips Avent Glass Natural Baby Bottle Review

The Philips Avent glass bottle is a sturdy, reliable option with a thick glass body and a one-handed lid, although it can be tight. The nipple is firm and features a simple design for easy cleaning and assembly.

Philips Avent Glass Natural Baby Bottle
Philips Avent Glass Natural Baby Bottle

A significant advantage is its excellent liquid retention when inverted. The optional number one nipple provides a slow flow rate (second slowest), perfect for newborns.

Lid of the Philips Avent bottle
Lid of the Philips Avent bottle

Overall, this is a simple, durable, and easily cleanable option for parents of newborns.

Tommee Tippee Glass Bottle Review

The Tommee Tippee glass bottle is slightly larger than the Philips Avent, with a less refined increment marking. The lid design allows for easy one-handed opening.

Tommee Tippee Glass Bottle
Tommee Tippee Glass Bottle

It has a softer, thinner silicone nipple with a single vent design. However, this bottle leaked when inverted, dripping even with gentle shaking.

Lid of the Tommee Tippee bottle
Lid of the Tommee Tippee bottle

Interestingly, air re-entered the bottle through the nipple during testing, potentially resulting in foamy milk. This may be a design flaw affecting the feeding experience.

Inverted Tommee Tippee bottle showing leakage
Inverted Tommee Tippee bottle showing leakage

Dr. Brown's Options+ White Neck Glass Baby Bottle Review

Dr. Brown's bottle has a tight lid, making one-handed opening difficult. Its intricate anti-colic design, while effective, makes cleaning challenging.

Dr. Brown's Options+ White Neck Glass Baby Bottle
Dr. Brown's Options+ White Neck Glass Baby Bottle

The nipple lacks vents; air enters through the white collar and is channeled to the back of the bottle, but this bottle leaked significantly and had the fastest flow rate during testing.

Close-up of the Dr. Brown's bottle showing the air flow mechanism.
Close-up of the Dr. Brown's bottle showing the air flow mechanism.

The leaky design and cleaning difficulty make this bottle less user-friendly compared to other options.

Euphoria Silicone-Coated Glass Bottle Review

The Euphoria bottle features a glass body with a silicone coating, offering a soft, grippy texture. The lid easily pops off with one hand.

Euphoria Silicone-Coated Glass Bottle
Euphoria Silicone-Coated Glass Bottle

It includes a silicone filter that traps air, preventing it from entering the milk stream directly. This design is far easier to clean than the Dr. Brown's bottle.

Close-up of the silicone filter
Close-up of the silicone filter

The nipple offered the slowest flow rate among all tested and excellent liquid retention, making it ideal for newborns.

Inverted Euphoria bottle showing minimal leakage during vigorous shaking
Inverted Euphoria bottle showing minimal leakage during vigorous shaking

Hakka Gen 3 Natural Glass Baby Bottle Review

The Hakka Gen 3 bottle boasts a beautiful, well-crafted design with an off-center nipple. The lid opens easily with one hand, and the bottle's shape facilitates easier feeding.

Hakka Gen 3 Natural Glass Baby Bottle
Hakka Gen 3 Natural Glass Baby Bottle

It features a base vent on the nipple, eliminating the need to rotate the bottle. The bottle opening is wide, making cleaning simple.

Lid of the Hakka bottle
Lid of the Hakka bottle

The bottle retains liquid well when inverted, although slight leakage can occur with vigorous shaking.

Close-up showing the bottle's design and construction
Close-up showing the bottle's design and construction

Como Tomo Natural Feel Baby Bottle Review

The Como Tomo bottle features an almost entirely silicone body, offering durability. The lid is a bit tight, but it is easy to operate with one hand.

Como Tomo Natural Feel Baby Bottle
Como Tomo Natural Feel Baby Bottle

The nipple has two vents positioned opposite each other, eliminating the need to worry about the bottle's orientation during feeding.

Como Tomo nipple showing the two air vents
Como Tomo nipple showing the two air vents

The liquid retention is moderate; slight leakage occurs with shaking, but the wide opening simplifies cleaning.

BB Baby Glass Bottle Review

The BB Baby glass bottle, made by Dage, is aesthetically pleasing with an elongated lid for easy single-handed opening. The nipple is made of natural rubber.

BB Baby Glass Bottle
BB Baby Glass Bottle

The bottle has precise 5mm increment markings, enhancing accuracy in measuring liquids. However, the natural rubber nipple provides only moderate liquid retention when inverted, and leaks occur.

Close-up of the BB Baby bottle showing the precise markings.
Close-up of the BB Baby bottle showing the precise markings.

The bottle comes with an airtight cap and collapsible funnel for convenient transportation and formula preparation.

Inverted BB Baby bottle showing leakage
Inverted BB Baby bottle showing leakage

Conclusion & Recommendations

The Euphoria bottle stands out for its exceptionally slow flow rate, ideal for newborns and closely mimicking breastfeeding. The Philips Avent bottle offers a simple, durable alternative.

Euphoria bottle highlighted in the concluding remarks
Euphoria bottle highlighted in the concluding remarks

As babies grow, options like the Hakka Gen 3 and Como Tomo provide higher flow rates and convenient features. Dr. Brown's bottle, while effective, is less user-friendly due to cleaning difficulties and leakage.

Philips Avent bottle mentioned in the conclusion
Philips Avent bottle mentioned in the conclusion

The best bottle depends on individual needs, but the Euphoria and Philips Avent bottles are excellent choices for newborns, while the Hakka and Como Tomo cater well to older infants.

Hakka Gen 3 bottle highlighted
Hakka Gen 3 bottle highlighted