Baby
Thyseed 5 oz Glass Anti-Colic Baby Bottle — Slow-Flow Nipple (0m+)
Product description
Anti-colic vent at the base to reduce swallowed air and bubbles: The bottle’s lower vent separates air from milk during feeding, helping lower gas and discomfort. This vent design has supporting clinical evidence published in JAMA.
Gentle, paced milk delivery for easier feeding: The nipple features many tiny openings that create an even, steady flow, helping babies avoid gulping and frustration during feeds.
Soft, flexible silicone for a more natural mouthfeel: The nipple is made from ultra-soft silicone that flexes with baby’s tongue and jaw, supporting familiar feeding motions and easing breast-to-bottle transitions.
Shaped like a breast for a deeper latch: A wide, realistic nipple base promotes a more natural latch and helps minimize stress when switching between direct breastfeeding and bottle feeding.
High-quality, safety-tested components: Constructed from WACKER liquid silicone (Germany), premium polypropylene from TotalEnergies (France), and food-grade borosilicate glass. The materials are BPA-free, resist odors, and are built for repeated everyday use.
Multiple flow options to match growth stages: Six different flow rates are offered so caregivers can select the speed that best fits the baby’s feeding stage and comfort level.
Simplified design for faster cleaning: The bottle has fewer pieces and a wide neck for easier assembly and washing. Components are dishwasher-safe on the top rack, making routine care more convenient.
What’s included and sizing: This listing is for a single 5 oz glass bottle packaged with an extra-slow (0m+) breast-like silicone nipple, a base vent assembly, and a cap. It’s intended for newborns and infants who need a slow, paced flow.
Pros
- Clinically supported vent that reduces swallowed air
- Realistic, ultra-soft nipple for easier latch and transition
- Durable, high-quality glass and medical-grade materials
Cons
- Glass-only option may not suit all caregivers
- Initial cost can be higher than basic plastic bottles
- Some buyers received items with cosmetic imperfections
VerdictThis glass anti-colic bottle combines a clinically studied base vent with a breast-like, ultra-soft silicone nipple to ease transitions between breast and bottle. Materials are premium—WACKER liquid silicone, TotalEnergies PP, and food-grade borosilicate glass—so it’s durable and odor-resistant. Fewer parts and a wide neck simplify cleaning. It’s particularly effective for breastfed infants who ne
Reviews
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Angelica 1/5
Arrived broken and delayed
Delivery took too long, the item felt overpriced, and it arrived completely shattered. Very disappointing.
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Aliza Michelle 5/5
Happy so far, minor shipping flaw
My daughter took to it right away and it works as advertised. It arrived with a tiny surface scratch, which was disappointing, but it didn’t affect function. I cleaned it thoroughly before use and would buy a larger size later.
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Liv 5/5
Performs as described
Perfect for our baby who also breastfeeds. No nipple confusion when alternating, and our baby’s suck improved after introducing this bottle.
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A.A 5/5
Well made and convenient
I love the build quality and the glass feel. Feels sturdy and the nipple performs reliably. Size is perfect for our infant and cleaning is straightforward. Highly recommend.
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Mango Mood 5/5
Solved feeding refusal quickly
Beautifully made and well thought-out. Our baby had refused bottles for weeks — now takes a full 4 oz feed in under five minutes without fussing. Extremely grateful; I’ll be buying the next size soon.
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Stephanie 5/5
Finally a bottle that works for us
Wish I’d tried this sooner. My 8-week-old (mostly breastfed) was getting nipple confusion and trapped air with other bottles. This one fixed the flow and gas issues, is sturdy glass, doesn’t leak, and cleans easily. Only bottle my baby accepts.
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Art Alexander 5/5
Solid performance despite initial concerns
The bottom vent looked odd at first, but it hasn’t leaked. Nipple holds up even upside down. Much easier to clean than many brands. A bit pricey but delivers. Would like a non-glass option, though.
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lakeisha 5/5
Consistently great
I keep buying these — no spills and the anti-colic feature really works. My niece loves them too; very pleased with performance.
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Selina 5/5
Excellent quality — worth it
This has been a lifesaver for my breastfed baby. Occasional bottle feeds are easier now — less reflux and colic. I prefer glass for cleaning and durability. After switching, other bottles stayed unused. Very satisfied.
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K.Bee 5/5
Reliable for breastfed babies
Our newborn has used these from day one. He latches well, and the bottles help reduce his gas. Love that there are only three pieces to wash — bottle, nipple, and cap — and no microplastics in the design.
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María Fernanda Sánchez Galván 5/5
Sturdy, effective, very pleased
I liked them a lot — tough glass and truly anti-colic. Attractive and excellent quality.
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