Mason Bottle Mason Jar Bottle System
Turns a regular-mouth glass mason jar into a bottle or sippy - liquid only ever touches glass, steel, and silicone.
The verdict: Silicone only
A stainless steel band clamps a silicone nipple, sippy spout, or straw top onto a standard regular-mouth glass mason jar. The brand's whole pitch is that liquid only contacts glass, stainless steel, or silicone - no plastic in the path. The band is 304 food-grade steel and the tops are medical-grade silicone, so this is a clean silicone-only across both the infant-bottle and sippy stages. (There's also an all-silicone squeeze bottle variant - still silicone-only.)
What it's made of
| Part | Material | Food contact |
|---|---|---|
| jar body standard regular-mouth mason jar (Ball/Kerr-type soda-lime glass); glass is the vessel | Soda-Lime Glass | Yes primary |
| band / ring 304 food-grade stainless steel band clamps the top on - steel, not plastic | Stainless Steel 304 / 18-8 | Yes primary |
| nipple (infant variant) medical-grade silicone dual-vented (FussFree) nipple | Silicone | Yes primary |
| sippy spout (variant) silicone sippy/drink top that fits the same band and jar | Silicone | Yes primary |
| straw top (variant) silicone straw top option | Silicone | Yes primary |
| protective boot / sleeve optional silicone boot for grip and drop protection | Silicone | No |
A conversion system rather than a single bottle: a 304 stainless steel band and a silicone top (nipple, sippy spout, or straw) fit any standard regular-mouth glass mason jar, turning a jar you may already own into a baby bottle and then a sippy cup. Made in the USA. The brand also sells an all-silicone squeeze bottle for the same purpose.
Pros
- Steel band instead of a plastic collar; grows from bottle to sippy to straw cup
- Uses cheap, replaceable, universally available mason jars
- Interchangeable tops cover both the infant-bottle and sippy stages
Cons
- Mason jars are heavy and breakable (a silicone boot helps)
- Wide jar mouth is bulkier than a purpose-built bottle
- Still silicone (not natural rubber), so not for zero-silicone purists
- You supply/replace the jars yourself
Notes
- Tops are interchangeable on one band/jar: infant nipple, sippy spout, straw - hence both categories
- An all-silicone squeeze bottle variant also exists (still silicone-only); the glass+steel system is the flagship
- Fits standard regular-mouth mason jars only (not wide-mouth)
Common questions
Does the Mason Bottle Mason Jar Bottle System have plastic in it?
No petroleum plastic touches your food. On the Mason Bottle Mason Jar Bottle System, the nipple (infant variant), sippy spout (variant) and straw top (variant) are silicone, and the rest of the food path is Soda-Lime glass and stainless steel.
What is the Mason Bottle Mason Jar Bottle System made of?
Part by part, the Mason Bottle Mason Jar Bottle System is: jar body — Soda-Lime glass; band / ring — stainless steel; nipple (infant variant) — silicone; sippy spout (variant) — silicone; straw top (variant) — silicone; protective boot / sleeve — silicone.
Does the Mason Bottle Mason Jar Bottle System have silicone in it?
Yes — the nipple (infant variant), sippy spout (variant), straw top (variant) and protective boot / sleeve are silicone on the Mason Bottle Mason Jar Bottle System. That is a primary contact surface, not just a seal — your food is in direct contact with it.
Is the Mason Bottle Mason Jar Bottle System BPA-free?
No plastic touches your food on the Mason Bottle Mason Jar Bottle System — the food path is Soda-Lime glass, stainless steel and silicone — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Where is the Mason Bottle Mason Jar Bottle System made?
The Mason Bottle Mason Jar Bottle System is made in the USA.
Categories: Baby Bottles · Sippy Cups & Toddler Cups
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://masonbottle.com/ brand states liquid and food only come in contact with glass, stainless steel, or silicone
- manufacturer https://www.amazon.com/Mason-Bottle-Silicone-Nipples-Two-Pack/dp/B01I2TOSS0 nipples are pure medical-grade silicone, BPA-free; bands are 304 food-grade stainless steel
- review https://thebluebonnetfarmhouse.com/the-best-healthy-baby-bottle-and-sippy-cup/ independent review of the glass mason bottle used as both bottle and sippy cup
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.