Stenviax
Buy

Warm milk in 70 seconds. Anywhere.

Four ounces of breast milk reaches 98 °F in about 70 seconds. It runs on its own battery, so the bottle is ready wherever you happen to be standing.

Buy on Amazon
Stenviax Portable Bottle Warmer Pro in Silk Beige, closed, with the display lit at 104 °F

Measured from refrigerator temperature at a full charge.

  • 4 oz breast milk to 98 °F

    70 s

  • 6 oz water to 110 °F

    2 min

Both times measured from refrigerator temperature at a full charge.

  • 7

    temperatures, milk and water

    Four water modes and three milk modes, selected on the device.

  • 14,000 mAh

    battery, charges over USB-C

    14.8 V, 120 W heating element.

    50 min empty to full. With the 45 W PD adapter and braided USB-C cable in the box.

  • 17 oz

    chamber, 500 ml

    Food-grade 316L stainless steel.

  • 149 °F

    self-clean cycle, 20 minutes

    Pasteurisation runs for 20 minutes on the chamber and on items placed inside it.

Opens with one thumb, in the dark.

The lid is the part you touch at three in the morning, half awake, without turning a light on. It is built to be worked one-handed and to stay shut the rest of the time.

Lock
Push the lock up and press it to release the lid. Press it down and the lid is secured, which is what keeps the warmer from leaking in a bag.
Seal
Closed, the lid covers the whole 17 oz chamber, and the slider keeps it that way while the warmer is in a bag.
Pour
Warm it, slide the lock, pour. The same open mouth takes the 149 °F clean cycle afterwards.
Silk Beige warmer lying on its side with the lid open and the strap in frame

Seven temperatures, and the one you pick is the one it holds

Three for milk, four for water, across the 30 °F the warmer covers. Set one.

The Silk Beige warmer with breast milk warming in its chamber, the display reading 98 °F
Set to 98 degrees Fahrenheit, milk.

Body temperature. 4 oz breast milk to 98 °F in about 70 seconds.

What are you warming
Temperature
The warmer on black silk: the bottle revealed, the lid opening, and water churning in the chamber

Warm milk, on its own battery

4 oz breast milk to 98 °F in about 70 seconds, on the 120 W element and the 14,000 mAh battery.

Measured from refrigerator temperature at a full charge.

3 a.m. No kitchen trip.

It is already beside the bed and already charged, so the feed starts where the baby is.

A mother smiling as she pours a warmed bottle at the bedside while the baby sleeps

  • 70 s

    4 oz breast milk to 98 °F

  • 14,000 mAh

    battery, charges over USB-C

Measured from refrigerator temperature at a full charge.

  • No kitchen trip

    It runs on its own battery, from the nightstand.

  • One hand

    Slide the lock, lift the lid, pour.

  • A readable display

    The temperature you set, with the milk, water and pasteurisation symbols.

And then the sun comes up.

The warmer that got you through the night goes in the bag for the rest of the day, and waits on standby for up to 48 hours.

14,000 mAh
battery, built in
50 min
empty to full, on the adapter in the box
17 oz
chamber
7
temperatures, set on the device
  • A parent lifting the warmer from the passenger seat, a baby laughing in the car seat behind
    In the car
  • A mother walking a pram through spring blossom, the Silk Beige warmer in the handle's cup holder
    On the walk
  • A father hiking with a laughing baby in a carrier, the Silk Beige warmer in the pack pocket, its display reading 104 °F
    On the trail
  • A mother holding her smiling baby while spooning formula into a bottle, the Silk Beige warmer on the kitchen counter beside her
    At the counter
  • The warmer heating water on a nursery table beside a folded blanket
    Back at home
  • Two families laughing at a garden dinner table, the Silk Beige warmer standing among the plates with its display reading 104 °F
    At the table outside
  • A parent holding a baby on a flight with the warmer on the tray table
    On a flight
  • The Silk Beige warmer standing in the side pocket of a changing backpack on a park bench
    In the bag

It cleans its own chamber at 149 °F

Press milk and water together and the chamber runs its own clean cycle, 149 °F for 20 minutes. The pasteurisation symbol stays lit until it is done.

The Silk Beige warmer running its clean cycle on a nursery table, steam rising, a bottle of milk and a pacifier beside it
149 °F20-minute cycle
  • A pacifier sitting inside the Silk Beige warmer's open steel chamber, steam rising from it

    A pacifier, in the same cycle

    Pasteurisation runs for 20 minutes on the chamber and on items placed inside it.

  • Milk, pasteurised

    The same cycle can pasteurise milk in the chamber. 149 °F for 20 minutes.

Clean cycle
149 °F for 20 minutes
Chamber
17 oz / 500 ml
Chamber material
Food-grade 316L stainless steel

The two buttons that start it are in the operating steps.

Looking straight down into the empty stainless steel chamber
The empty chamber
The Silk Beige warmer with its lid flipped open, showing the seal inside the lid, the pour spout and the lock slider
The seal
The lock slider on the Silk Beige warmer's lid, marked with an open and a closed padlock
The lock

It stops itself if the chamber is empty

The warmer heats only when it senses liquid, so with nothing in the chamber it stops and shows E2 on the display until you add water or milk.

The lid locks
A slider on top locks the lid shut and releases it again under one thumb.
It holds the number you picked
It runs to the temperature you chose, beeps twice when it is there, and holds it. Switch it off once the feed is warm and the battery goes further.
What it is made of
Chamber: Food-grade 316L stainless steel. Lid: BPA-free.

Who stands behind it

The heating chamber is food-grade stainless steel and has passed food safety testing.

The manual’s safety lines are printed in full on the support page.

Designed and engineered in
United States
Trademark
Registered in the United States

More heating power than the two travel warmers beside it

Both are cordless, like this one. Ours heats at 120 W against their 85 W and 115 W, and heating power is what decides how long you stand there holding it.

Breast milk, 4 oz to 98 °FShorter is sooner
  1. Stenviax Pro70 seconds
  2. Tall flask-style warmer5 minutes
  3. Wide-mouth tumbler warmer2 min 30 s
The Stenviax Portable Bottle Warmer Pro compared with a tall flask-style travel warmer and a wide-mouth tumbler warmer, by warm-up time, heating power, charge time, battery and self-clean cycle.
Stenviax ProCordless. Heats the milk in its own steel chamber.Tall flask-style warmerA thermos-shaped travel warmer, tall and narrow.Wide-mouth tumbler warmerA shorter, wider travel warmer with a screw-top mouth.
Breast milk, 4 oz to 98 °F70 seconds5 minutes2 min 30 s
Heating power120 W85 W115 W
Charge timeAbout 50 minutes1.5 hoursNot published
Battery14,000 mAhNot published14,400 mAh
Self-clean cycle149 °F for 20 minutesNone claimedClaimed, no figures
See the full comparison
Stenviax Portable Bottle Warmer Pro in Silk Beige, closed, with the display lit at 104 °F

Choose your finish

The same warmer inside either shell. $69.90, and the one you pick here is the one that arrives.

1

$69.90

Buy on Amazon

In the box, with every warmer

  • The warmer
  • Braided high-speed USB-C cable
  • 45 W PD fast-charging adapter
  • User manual
  • Quick start guide

Food-grade 316L stainless steel chamber, BPA-free lid.

  • Apple Pay
  • Google Pay
  • Link
  • Visa
  • Mastercard
  • Amex

Questions

Eight quick answers. The longer set, the manual and the contact form are on the support page.

About 70 seconds for 4 oz of breast milk to 98 °F, and about 2 minutes for 6 oz of water to 110 °F. Both times are measured from refrigerator temperature at a full charge.

Both. Choose a milk mode at 92, 95 or 98 °F for breast milk, which the manual caps at 98 °F. Choose a water mode between 98 and 122 °F to heat the water you mix formula into.

It stops and shows E2 instead of heating. Pour milk or water in and the code clears on its own.

Rinse the chamber and the lid with clean or mildly soapy water as soon as you have poured, then separate the lid and the silicone parts and stand the warmer upside down to drain. It never goes in water and never goes in a dishwasher, so the buttons and the charging port are wiped with a damp cloth instead.

Pressing the milk and water buttons together starts pasteurisation at 149 °F for 20 minutes. It runs on the chamber itself and on anything small enough to sit inside it, and the pasteurisation symbol stays lit until the 20 minutes are up.

About 50 minutes from empty to full, on the 45 W PD adapter and the braided USB-C cable that come in the box. The warmer takes 5 V at 3 A over USB-C, and a different adapter will still charge it.

The chamber holds 17 oz, or 500 ml, in food-grade 316L stainless steel. Milk warms in the chamber and pours straight into your bottle.

Five things: the warmer, a 45 W PD fast-charging adapter, a braided high-speed USB-C cable, the user manual and a quick start guide.