Glass Baby Bottle with Silicone Sleeve
Borosilicate glass with a grippy silicone sleeve - but the cap, ring, and stopper are polypropylene that touches the milk path.
Plastic-free verdict: Minimal plastic contact
The bottle is borosilicate glass and the sleeve and nipple are silicone, but the cap, screw ring, and sealing stopper are polypropylene - and the ring plus the sippy/flat cap sit right in the milk path. So despite the "glass" branding, plastic does touch the drink. Better than an all-PP bottle, and the glass body avoids the worst microplastic shedding, but it's not silicone-only because of the PP collar and cap.
Verification: Manufacturer confirmed · reviewed 2026-07-05
What it's made of
| Part | Material | Food contact |
|---|---|---|
| bottle body made in France | Borosilicate Glass | Yes |
| nipple silicone nipple (stage 1/2) | Silicone | Yes |
| screw ring / collar PP ring seats the nipple against the bottle - milk contacts the ring lip | Polypropylene (PP, | Yes |
| cap (flat cap or sippy cap) PP; the sippy-spout cap variant is the drink surface for toddlers | Polypropylene (PP, | Yes |
| stopper / sealing disc PP travel stopper that seals the bottle opening | Polypropylene (PP, | Yes |
| protective sleeve removable silicone sleeve for grip and drop protection | Silicone | No |
A widely available borosilicate glass baby bottle wrapped in a colorful silicone sleeve for grip and shatter resistance. Sold in 4oz, 8oz, and 9oz sizes, and it converts toward toddlerhood with an optional silicone-sleeved sippy cap. The glass body and silicone sleeve are the selling points, but the cap/ring/stopper hardware is polypropylene.
Pros
- Borosilicate glass body - no microplastic shedding from the bottle itself
- Silicone sleeve makes glass far more drop-tolerant and grippable
- Very widely available; converts to a sippy with an add-on cap
- See-through - easy to gauge how much milk is left
Cons
- Cap, ring, and stopper are polypropylene, and they sit in the milk path
- The sippy-cap conversion drinks through plastic, not silicone
- Heavier than steel; still breakable if the sleeve is off
- Not silicone-only despite the glass branding
Notes
- Sizes: 4oz, 8oz, 9oz; optional sippy cap and flat cap sold for the same bottles
- To minimize plastic contact, some parents pair the glass bottle with a silicone nipple only and skip the sippy-cap stage
Categories: Baby Bottles
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.lifefactory.com/9oz-glass-baby-bottle-silicone-sleeve-sippy-cap-pair 9oz bottle listed with silicone sleeve, polypropylene cap/ring/stopper, and silicone nipple
- manufacturer https://lifefactory.com/pages/faq FAQ confirms borosilicate glass (France), silicone nipples and sleeve, and a cap/ring/stopper set (does not dispute PP)
- review https://www.amazon.com/Lifefactory-Glass-Bottle-Transitioning-Sippy/dp/B0767LS794 listing confirms glass body, silicone sleeve, and sippy-cap conversion