2-packTwo bottles in the box
The Wrapped Glass Bottle
From $60 for 2 bottles $54 with Subscribe & save
$30 a bottle $60 for 2
Only glass and food-grade silicone touch the milk. Independently lab-tested.
We ship to US addresses only.
A borosilicate glass baby bottle wrapped in food-grade silicone, shaped directly around the glass (not sprayed on) for grip and everyday impact protection. Milk contacts glass and silicone. Glass can still break, so inspect before every use.
Bottle size · 2 bottles
How many setsbottles
Plan on 2 to 3 sets (4 to 6 bottles) if you wash twice a day.Plan on 4 to 6 bottles if you wash twice a day. How we count
Combo feeding? Bare glass warms faster.
How you buy
Subscribe & saveAdd nipple refills · save 10%
Subscribe & save 10%First box ships free10% offFree extra nipple pack
Save 10%
$54
$60
/ set
One-time purchase$60 / set
Baby’s age
?
Your baby’s age sets the bottle-upgrade timing and when refills end. Nipple flow stays your choice.
Baby’s birth date
At 10 months we need the exact date: the first refill has to arrive by baby’s first birthday.
Subscriptions start before 11 months. For a baby 11 months or older, choose One-time purchase above.
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Today
First box · ships free
- 2 × The Wrapped Glass Bottle (5 oz / 160 ml), Sip installed
Drop nipple 2-packFree extra pack · Slowest flowFree $10 -
Every 2 months
Sip nipple 2-pack
Until your baby turns one
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Skip, pause, change the flow or cancel anytime in My Subscription.
- 1 × The Wrapped Glass Bottle2 bottles · 5 oz / 160 ml · Sip installed
- 1 × Drop nipple 2-packSubscription welcome giftFree
Then every 2 months: 1 × Sip nipple refill 2-pack. Refills are $9 per 2-pack; regular-refill shipping is $3 per shipment. Tax extra where applicable. 5 oz plans started before four months get a paid 8 oz upgrade at four months unless you keep 5 oz in My Subscription: $57.60 for the Wrapped Glass pair, or $88.60 for the Duo (all four bottles), plus $3 shipping.
The Duo adds 1 × The Glass Bottle (2 bottles, 5 oz / 160 ml) and 2 refill 2-packs per delivery instead of 1.
1
First subscription box price. Refills billed separately.
One-time purchase of 2 × 5 oz / 160 ml bottles, no subscription. Turn on JavaScript to subscribe or add the Duo.
The Duo
Both bottle styles in one four-bottle set.
+
$84
$100
Save $16
Subscription price · $90 one-time
- Same nipples and parts across all four bottles
- First subscription box ships free
- Nipple refills for all four bottles + free subscription welcome gift
- 10% off applies to the Wrapped Glass
The Wrapped Glass Bottle
$60$54 $60
Details
Materials: The bottle body is borosilicate glass, wrapped in food-grade silicone. The nipple and optional venting tube are food-grade silicone. The cap and collar are plastic, outside the direct milk path.
Care: Take all parts apart and wash after every feed. All parts are top-rack dishwasher safe. Clean and sanitize before first use. Replace nipples every two months, or sooner if worn or damaged.
An optional venting tube. No vent to keep facing up.
The nipple vents with or without the tube. Our patent-pending silicone tube routes incoming air toward the air pocket at the base, so the nipple vent does not need to face up.
$10 for a 2-pack. Sized for the 5 oz bottle; in the 8 oz, fill to 5 oz or less.
Shipping & Delivery
United States shipping only. Standard shipping is free on one-time orders of $65 or more (after discounts) and $7 under $65. Your first subscription box ships free; later boxes are $3 flat. Refill and upgrade prices are listed under Included items & pricing, above.
You’ll receive tracking when your order ships. See our Shipping Policy for processing and delivery times.
Returns & Exchanges
Unopened items in their original packaging can be returned within 30 days of delivery. Sets must be complete. We provide a prepaid return label and refund the original payment method. Opened bottles use the Baby Love Guarantee instead. Opened nipples and feeding accessories are final sale for hygiene reasons. See Returns for the full conditions.
2-packTwo bottles in the box
Built as one.
A glass bottle with a soft silicone wrap, a flexible nipple, and a separate route for incoming air. Here’s how the parts work together.
Glass where the milk goes.
A borosilicate glass body holds the milk. The soft silicone wrap stays on the outside.
Wrapped, not sprayed.
Silicone is shaped directly around the glass, with extra thickness at the base. No separate sleeve to slip off or wash.
Air takes its own route.
Our patent-pending venting system uses an optional silicone tube to route incoming air toward the bottle’s base, without keeping the nipple vent facing up.
Soft silicone. Four flows.
Soft German Wacker silicone, shaped with breastfed babies in mind. Built-in venting and four flows let you choose a pace that suits your baby.
A silicone wrap built to protect.
Silicone shaped around glass to cushion impacts, with extra thickness at the base. Glass can still break: if it cracks or chips, stop using the bottle, even if the wrap still holds it together.
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0
Plastic in the milk path. Milk contacts glass and silicone.
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4
Nipple flows, named by pace: Drop, Sip, Stream and Rapid.
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20Shore A
Soft German Wacker silicone, in all four flows.
One subscription for baby’s first year of bottle feeding.
Automatic deliveries and timely feeding tips. Less to research. Less to remember.
Fresh nipples every two months.
Worn nipples can let milk flow faster, making it harder for baby to keep up. Fresh replacements arrive in your chosen flow.
Bigger bottles at four months.
5 oz plans started before four months get a paid 8 oz upgrade, unless you keep 5 oz in My Subscription.
Feeding emails as baby grows.
Practical tips, timed to your baby’s age.
Choose nipple flow by feeding pace, not age.
Tap a flow to compare
Sip
≈100 ml in 10 minutes
Included with 5 oz / 160 ml bottles
A rough comparison, not a feeding target. No need to move up with age.
5 oz / 160 ml (Wrapped Glass Bottle)
Height
15.51 cm / 6.11 in
Diameter
6.65 cm / 2.62 in (wide-neck)
Weight
Approx. 211 g / 7.44 oz
8 oz / 240 ml (Wrapped Glass Bottle)
Height
18.66 cm / 7.35 in
Diameter
6.65 cm / 2.62 in (wide-neck)
Weight
Approx. 247 g / 8.71 oz
Sharp points, edges and small parts
Applicable U.S. CFR Title 16 tests
Pass
Lead in the silicone exterior and other parts
16 CFR Part 1303 / CPSIA Section 101
Below 20 ppm, the report’s reporting level
Specified phthalates
16 CFR Part 1307
Pass
BPA, BPS and BPF
LC-MS on components identified in the report
Below 0.1 ppm detection limit
PVC
Qualitative Beilstein test on identified components
Negative
Nipple nitrosamines
FDA Compliance Policy Guide 7117.11
Pass
Venting-tube rubber extractables
21 CFR 177.2600 section (e)
Pass
Age
For bottle-feeding through 12 months. Follow your pediatrician or feeding specialist for individual guidance.
Pre-installed flow
5 oz / 160 ml bottles ship with Sip installed. 8 oz / 240 ml bottles ship with Stream installed.
Nipple flow system
Drop · Sip · Stream · Rapid, named by pace, not age.
Feeding pace
Designed for paced feeding; adjust to your baby's cues, not the clock.
Milk path
Borosilicate glass and silicone form the direct milk path. The cap and collar sit outside the milk path.
Materials
The bottle body is borosilicate glass, wrapped in food-grade silicone. The nipple and optional venting tube are food-grade silicone. The cap and collar are plastic, outside the direct milk path.
Construction
A protective silicone layer is shaped directly around the glass, not sprayed on. It’s thicker at the base and stays on for washing.
Nipple shape
Soft, flexible German Wacker silicone, shaped with input from a board-certified lactation consultant. Built-in venting, with four flows to suit your baby’s pace.
Venting
Built-in nipple vent plus an optional patent-pending silicone venting accessory.
Subscription
Ships every 2 months through baby's first year with replacement nipples in the selected flow. Your first box includes two free spare nipples. Skip or cancel in My Subscription before the cutoff shown in your reminder.
Safety testing
Both sizes were tested by an independent third-party lab. See the results.
1. Before the first feed
Take all parts apart, wash, and sanitize. Choose an approved method: boil in clean water for five minutes, use a compatible steam sterilizer as instructed, or use the dishwasher’s sanitize cycle with heated drying. Let everything cool and air-dry before assembly.
2. After every feed
Disassemble, wash, and rinse every part, including the venting accessory if used. Use a clean bottle brush and basin, or the dishwasher’s top rack. Let parts air-dry fully before storing.
3. When to sanitize
CDC recommends daily sanitizing for babies under two months, babies born prematurely, and babies with weakened immune systems. For older healthy babies, thorough cleaning after each use may be enough. Follow your baby’s clinician’s advice. A dishwasher with hot water and heated drying or a sanitizing setting may remove the need for a separate sanitizing step.
4. Before every use
Check the glass and every component. Stop using any part that is chipped, cracked, torn, sticky, swollen, weakened, or otherwise damaged. Inspect carefully after a drop. Replace nipples every two months, or sooner if worn.
5. Warming and handling
Use an appropriate bottle warmer or warm-water bath, following both sets of instructions. Avoid sudden temperature extremes. Do not microwave the bottle or milk. Check milk temperature before feeding. Always supervise feeding, and keep loose parts away from children.
6. Storage
Store clean, fully dry parts in a clean, protected place. Do not close damp parts in a container. Do not use bleach or abrasive cleaners on Ronini parts.
Venting tube
An optional silicone tube that gives incoming air a separate route during feeding. Patent pending.
$10
Learn more: Venting tubeHow Ronini compares.
Compare the bottle materials and construction.
Ronini
Plastic
Silicone
Glass
Zero plastic in the milk path?
Only glass and silicone touch the milk?
Silicone wrap shaped around the glass?
Glass body won’t degrade or wear out over years of use?
Volume markings stay accurate (bottle doesn’t flex)?
Won’t absorb soap or detergent odors over time?
Soft-touch silicone grip?
Optional patent-pending venting tube?
Wide-base silicone nipple?
Varies
Varies
Varies
A feeding plan that keeps track for you?
Fresh nipples arrive every two months in your baby’s flow, and 5 oz plans schedule the paid 8 oz upgrade at four months, so you don’t have to keep track. How it works →
Fresh nipples arrive every two months in your baby’s flow, and 5 oz plans schedule the paid 8 oz upgrade at four months, so you don’t have to keep track. How it works →
Milk touches glass and silicone. The plastic cap and collar sit outside the milk path.
Ronini is a glass bottle, and it can break. The silicone wrap is designed to cushion impacts and help hold broken glass together. Inspect the bottle after any drop. If the glass cracks or breaks, stop using the bottle, even if the wrap still holds it together. More on glass bottles and drops.
No. We shape it directly around the glass, with extra thickness at the base. It stays in place, with no separate sleeve to remove for cleaning. Sleeve, coated or overmolded: what’s the difference.
It gives incoming air a separate route to the air pocket at the bottle’s base, so the nipple’s air hole doesn’t need to face up. It’s optional; the nipple also has built-in venting. A 2-pack is $10.
It has what people mean by the term: a vent in every nipple, an optional Venting Tube that keeps incoming air out of the milk, and four flows you pick by pace. We don’t print “anti-colic” on the box, though. The largest trial so far (1,041 babies, 2026) found no colic difference between vent designs, and no bottle has been shown to prevent colic. What the research says
Keep the flow that lets your baby feed comfortably. Age alone is not a reason to move up. For care and flow questions, see Bottle care FAQs →
Drop (SS) is slowest, followed by Sip (S), Stream (M) and Rapid (L). Sip comes installed on 5 oz bottles; Stream on 8 oz. All four flows fit both sizes. Choose by how your baby feeds, not age.
All components are top-rack dishwasher safe and can be sterilized with steam or boiling water. Rinse the nipple’s small air hole and slit under warm running water to clear milk residue. Dry every part fully, inspect before every use, and follow the care instructions in the box.
No. Don’t microwave milk: it can heat unevenly and create hot spots. Warm milk with a bottle warmer or a warm-water bath, and test the temperature before feeding.
Yes. Our wide-base silicone nipple was designed in consultation with an IBCLC, with breastfed babies in mind. Choose the flow that lets your baby feed comfortably.
Your first bottles are just the start. We schedule fresh nipples and eligible bottle upgrades, and send feeding tips as baby grows. Less research, fewer reorder dates to remember. You can skip or cancel in My Subscription before the shipment cutoff.
Start with Wrapped Glass or the Duo. Fresh nipples arrive every two months in your chosen flow; if your baby is under four months when you start with 5 oz bottles, the plan adds a paid upgrade to 8 oz when your baby turns four months, unless you keep 5 oz in My Subscription. You’ll receive feeding tips timed to baby’s age, too. Manage your plan in My Subscription. Refills stop after your baby’s first birthday. A refill scheduled on the birthday still ships.
First box: Wrapped Glass $54 (5 oz) or $57.60 (8 oz); Duo $84 (5 oz) or $88.60 (8 oz). Shipping is free. The bottle discount applies to Wrapped Glass only.
Refills every two months: $9 for two nipples, or $18 for the Duo’s four. Shipping is $3 per regular refill shipment. Tax extra where applicable.
If your baby is under four months when you start with 5 oz bottles, the plan adds a paid upgrade to 8 oz bottles when your baby turns four months: $57.60 for the Wrapped Glass pair, or $88.60 for the Duo (all four bottles), plus $3 shipping (one $3 charge if it ships with a refill). You can keep 5 oz instead in My Subscription before that box is processed.
Both share borosilicate glass, nipples and parts. Wrapped Glass adds protective silicone shaped around the bottle, with a thicker base to cushion knocks. The Glass Bottle has no wrap, so it warms faster: ideal for warming at home, with The Wrapped Glass Bottle for days out. See how both compare with other glass bottles.
Contact us within 30 days of delivery. We’ll help with feeding guidance and, if needed, a free nipple-flow exchange. If that still doesn’t help, send the bottles back with our prepaid label for a refund. See the Baby Love Guarantee.
What parents say
Customers who post a review, at any rating, get a one-time 15% thank-you code by email afterward, and we don't remove critical reviews.
Pairs well with
The Glass Bottle
2 bottles · from $40
The Nipple
2 nipples · $10
The Venting Tube
2 tubes · $10
