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NUK Simply Natural Glass Baby Bottles, 4 oz, 3-Pack
Baby Bottles

NUK Simply Natural Glass, 4 oz 3-pack

#1 · Best Overall
7.9 /10 Our score
Lowest verified price $19.99 Amazon
Our verdict
The most balanced glass bottle we found. Strong hands-on results, a wide neck and a low per-bottle cost make it the default choice for most parents. Add a sleeve separately if drops worry you.

Pros

  • BabyGearLab Editors' Choice for glass (79/100)
  • Leakage scored 9/10 in hands-on testing
  • Wide neck and few parts make cleaning easy
  • Borosilicate body, BPA-free
  • Lowest cost per bottle in this lineup

Cons

  • White volume markings are hard to read
  • Asymmetrical nipple needs careful positioning
  • No protective sleeve included
  • Reviewers note it may encourage a lazy latch in some breastfed babies

Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

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Last reviewed November 10, 2026
Review

What to know about NUK Simply Natural Glass, 4 oz 3-pack

A wide-neck borosilicate glass bottle with NUK's breast-shaped, multi-hole silicone nipple and an anti-colic vent. In BabyGearLab's hands-on tests it was the Editors' Choice for best glass bottle (79/100), led by a 9/10 leakage score. Mommyhood101 and BestReviews also list it.
Editorial notes

Why it stands out

Why we like it

BabyGearLab named it its Editors' Choice for glass, with a 79 out of 100 overall, the highest of the glass bottles it tested. Leakage scored 9 out of 10 and eco-health 8 out of 10. For a glass bottle, that leak result matters: fewer wet burp cloths and diaper bags.

The wide neck makes pouring formula and scrubbing simple, and the venting sits in the nipple, so there is no insert to wash. It is sold in a three-pack and works out to the lowest per-bottle cost among our picks.

What to know

Skip it if you need easy-to-read volume marks or a protective sleeve. Breastfed babies who latch carefully may also take time to adjust to the nipple shape.
Performance

Score breakdown

Feeding performance

Nipple acceptance and latch, flow consistency, anti-colic venting and leak resistance, as observed by hands-on testers (BabyGearLab leakage/nipple scores, Babylist, Milkology) and owner reports.

8.3
BabyGearLab gave it 79/100 overall, the best of the glass bottles it tested, and 9/10 for leakage. The nipple must be positioned correctly.
Health & materials

What touches the milk: borosilicate vs tempered glass, silicone or stainless steel vs plastic parts, independent tests for BPA, lead and phthalates (Consumer Reports), lead-in-markings history and recalls (CPSC), and plastic-free claims.

8.0
Borosilicate glass and 8/10 eco-health from BabyGearLab. The CPSC recall applied to a different UK-market product. No CR chemical test.
Durability & breakage protection

Resistance to thermal shock and drops, whether a protective silicone sleeve or coating is included, and reports of chipping or cracking.

6.5
No sleeve, and BestReviews advises checking for hairline cracks.
Ease of cleaning

Number of parts, neck width, dishwasher and sterilizer compatibility, and whether markings stay legible over time.

7.5
Wide neck, few parts, top-rack dishwasher safe.
Ease of use & handling

Weight, grip, readable volume markings, breast-pump compatibility, and versatility (sippy/cup conversion, interchangeable nipples).

7.0
The wide neck is easy to fill, but the white markings are hard to read (Mommyhood101).
Value

Price per bottle relative to performance, durability, and availability of replacement parts and nipples.

9.0
$6.66 per bottle with the top tested glass score.
Specifications

NUK Simply Natural Glass, 4 oz 3-pack specs

Materials

Bottle body material
Glass
Glass type
Borosilicate
Other milk-contact parts
Medical-grade silicone nipple; collar
BPA-free (manufacturer claim)
Yes

Durability

Protective sleeve/coating included
No

Design

Available sizes
4, 8 oz
Neck type
Wide
Anti-colic system
Vent in nipple
Empty weight (BabyGearLab measured)
5.8 oz

Purchase

Bottles in listed pack
3 bottles

Care

Dishwasher safe
Yes
Shopping

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Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

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AmazonLowest $19.99 $29.99 In Stock View deal
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Lowest verified price $19.99
30-day low $19.99
90-day average $19.99
90-day low $19.99

Based on 2 retailer price observations captured during the last 90 days.

More coverage

Guides featuring NUK Simply Natural Glass, 4 oz 3-pack

The Best Glass & Non-Toxic Baby Bottles of 2026 Best Overall · #1
Head-to-head

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