thyseed Anti-Colic Glass Baby Bottle — 5 oz 2-Pack, Breast-Like Extra-Slow Nipple and Vent System

The thyseed Anti-Colic Glass Baby Bottle is a 5 oz, two-pack glass feeding system with a breast-like, ultra-soft extra-slow nipple and a base vent designed to reduce bubbles and support gentler bottle feeds for breastfed newborns.

Designed for parents who want a bottle that mimics breastfeeding while minimizing air ingestion, this set combines food-grade borosilicate glass with WACKER liquid silicone and multiple flow options to match newborn feeding needs. The nipple’s wide, breast-like profile and micro-openings encourage a natural latch and steady, paced flow—helpful when you’re alternating between breast and bottle or easing a nursling into bottle feeds.

How does the anti-colic base vent improve feeding comfort?

The base vent separates air from milk so less air reaches the nipple during feeds, which can mean calmer, more comfortable feeding sessions. The design reduces bubbles and helps the milk flow remain consistent even when the bottle is tilted.

• Base vent channels air away from milk to lower swallowed air.
• Consistent flow reduces gulping and sudden pressure changes.
• Clinically studied vent concept provides evidence-based design.

Why is the nipple described as breast-like and extra-slow flow?

The nipple’s wide, rounded base and very soft silicone surface imitate key features of a mother’s breast to encourage a familiar latch. Multiple micro-openings create an extra-slow, steady flow that helps newborns coordinate sucking, swallowing, and breathing without gulping.

• Wide base for a deeper, more natural latch similar to breastfeeding.
• Ultra-soft silicone moves with the baby’s tongue for natural feeding motion.
• Micro-openings provide a paced flow suitable for newborns (0m+).

What materials are used and how easy is it to clean and maintain?

This bottle pairs durable borosilicate glass with high-quality silicone and premium polypropylene parts for a safe, long-lasting feeding solution. The simplified construction and wide neck make assembly and cleaning faster, and top-rack dishwasher-safe components streamline daily care.

• Food-grade borosilicate glass resists odors and thermal shock.
• Liquid silicone from WACKER and PP from TotalEnergies for safety-tested components.
• Fewer parts and a wide neck allow quicker hand-washing or top-rack dishwasher use.

How will this bottle adapt as my baby grows?

The thyseed system offers six flow rates, so you can select a nipple that matches your baby’s developing feeding speed and preference. Switching to faster flows is straightforward, letting the same glass bottles continue to serve through early infancy.

• Comes with extra-slow flow nipple ideal for newborns (0m+).
• Compatible with five additional flow options as baby develops.
• Reusable glass bottles and replaceable nipples reduce waste and cost over time.

Who is this for: Parents and caregivers seeking a bottle that closely resembles breastfeeding while offering anti-colic venting and durable materials. This two-pack of 5 oz glass bottles is aimed at newborns and breastfed infants transitioning to or combining bottle feeds, and for anyone wanting easy cleaning, safety-tested components, and a range of flow options to grow with their baby.