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frequently asked questions

Why our glass baby bottles over plastic?

Studies have shown throughout its lifecycle, plastics can continually leach chemicals. Of most concern are plastics labeled #3 polyvinyl chloride, which contain phthalates, #6 polystyrene and #7 polycarbonates which contain BPA. However, there are still concerns associated with ANY plastics, even BPA free plastics. With infants being the most vulnerable, more and more medical experts are recommending GLASS as the preferred choice in bottle feeding.

BPA-Free products still contain bisphenols of equal toxicity
~Dr. Mercola




See how 5 Phases compares to other glass bottles >

What are bisphenols and phthalates and why are they bad for us?

Bisphenols are chemicals found in many plastic products used by the modern day consumer. It is also found in, dental sealants, linings for canned foods, microwave ovenware, flame retardants, floorings, nail polishes, enamels, varnishes and much more. We are totally inundated with this chemical. According to the CDC, over 90% of Americans have bisphenols in their urine. In animal studies, even low levels of bisphenols  have been linked to cancer, diabetes, reproductive disorders and miscarriages. Right now BPA is in the limelight but there is also bisphenol S, AB, AF,B, BP, C , F, G M, P PH TMS and Z. Any of these bisphenols can be lurking in plastics. Many countries require testing on plastics looking for the banned chemicals BPA and phthalates but are not testing for chemicals that have estrogenic activity.

Phthalates are the softening agents of plastics and they're what make hoses flexible, lotions creamy and plastics more durable. Phthalates have also been used in many baby products, including teethers. The concern is that studies show this chemical has been linked with malformation of the reproductive tract, decreased semen quality, cancer and damage to liver, kidneys and other organs. With these findings, many companies have stopped selling products containing phthalates. Look for products that say "phthalate free."

About Phthalates - Our Stolen Future

What are hormone disruptors?

Studies have shown that many synthetic chemicals with estrogen activity (EA) interfere with our body's own natural hormone system. Hormone disruptors can block, alter and magnify the function of natural hormones. Our bodies are fooled by these "toxins" when they bind to the same sites of natural hormones. This can cause a wide variety of health problems. Studies have shown bisphenols, phthalates as well as other plastics to be hormone disruptors.

What are our baby bottles made of?

All components are BPA, phthalate and PVC free. The removable glass insert, when assembled with the translucent plastic sleeve, helps protect the glass. Should breaking occur, glass and liquid are contained in the plastic shell away from baby with no mess. Both nipple and glass bottle plug are silicone. Our bottles have been third party tested to meet strict FDA and EU guidelines.

Why buy our bottles over the traditional baby bottles?

Our unique patented design provides the healthful benefits of glass + the protection of BPA free plastic. Designed with the eco-friendly mom in mind, the interchaneable glass insert concept is one of a kind. The translucent plastic sleeve helps protect the GLASS insert which makes it a safer alternative for glass bottle users. All inserts are interchangeable and can be replaced with other 5 Phases GLASS inserts adding convenience and affordability. The ability to buy additional glass inserts reduces the carbon footprint on the environment by using less plastic. They make an excellent storage solution for pumped milk and formulas. Once baby is done using bottles, the removeable glass inserts are perfect for homemade baby food. Now thats eco- friendly!  

How do we assure our bottles comply with safety standards?

Chemicals and safety were our greatest concern when developing our hybrid glass baby bottle. 5 Phases glass baby bottles have been inspected and tested by a third party for known toxic and harmful chemicals. This third party is recognized in the US by the FDA, Canada and in the EU for product safety and quality control. Our bottles have passed rigorous infant safety and chemical testing. All tests comply with the specifications and regulations required in the US, Canada and EU.

How do you wash and care for bottles?

Before initial use, disassemble all parts and wash thoroughly. Sterilize both nipple and glass insert by boiling for 5 minutes. For subsequent cleanings, all bottle parts can be placed in the dishwasher, top rack only, not to exceed 140 F (60 C) or hand washed with mild soap and water. Do not force bottle brush into nipple as tears may occur.

Can each part be bought separately?

We currently offer 3 different flow rate nipples and the replacement 4oz and 8oz glass inserts, which include the silicone glass bottle plug.  Having the ability to purchase the less expensive interchangeable glass inserts and nipples separately makes our bottles convenient and more affordable.

Do we carry different flow rate nipples?

Fully assembled baby bottles come with a 0-3mos silicone nipple. We currently offer 3 different flow rates to accommodate your baby's feeding demands (0-3mos, 3-6mos and 6-9mos). Each nipple will have a flow rate number on the nipple itself for easy identification. The silicone nipples do have a venting system to help prevent vacuum build up and help baby swallow less air while feeding.

What is our return policy?

We are proud of our products and want you to be fully satisfied with every item you purchase from 5 Phases. If for any reason you are not completely satisfied, return the item within 30 days of purchase for a full refund of the purchase price.Our products are warranted to be free from defects in materials and workmanship for a period of 90 days from purchase. For return insturctions or details on our 5 Phases "EXCLUSIVE WARRANTY" please refer to our policy page.

How we try to make a difference?

Because we feel our environment is having a huge impact on our children, a portion of our profits goes to " Operation Smile". The team at Operation Smile consist of medical volunteers who provide free physical exams and reconstructive surgery for children and young adults with cleft lips, palates and other facial deformities. The causes of the deformities are unknown but environmental factors are suspect. These surgeries change the life of a child forever.


Please read all 5 Phases baby bottle warnings and instructions prior to use. If you do not have this information please call us at 877-659-1459 or email us at info@5phases.com.

The bottle is leaking

CHECK TO MAKE SURE GLASS INSERT IS NOT BROKEN! Fully assembled bottles are not shatter proof. If there is fluid between glass and the plastic shell this fluid will leak.

MAKE SURE BOTTLE IS PROPERLY ASSEMBLED. Insert glass into plastic sleeve; center the glass in plastic shell, hold glass centered by squeezing the waist of the plastic shell simultaneously screwing on the screw cap. Verify screw cap is on correctly. If the cap is not screwed on straight the silicone nipple will not seal onto the glass resulting in leakage.

My baby is not getting anything out of the nipple

Try a larger flow rate nipple. 5 Phases offers 3 different flow rate nipples 0-3mos, 3-6mos and 6-9mos.

Practice, practice practice! Babies who have only breast fed may have a harder time transitioning to the bottle. This may take some time. Keep with it!

The nipple is collapsing

Tilt the bottle enough to allow a constant uninterrupted flow of fluid through the nipple while feeding. If the baby sucks only air this can cause the nipple to collapse down into the bottle.


This is for informational purposes only. All claims strive to come from current and reliable information. Become informed. All information is at your fingertips.

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