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LIINI GmbH

Step-by-step instructions

Important note regarding charging adapters:

For charging LIINI® only USB adapters are suitable with an Output power of maximum 5V!

USB charging adapter for LIINI bottle warmer

When using fast charging adapters, it is mandatory to ensure that the adapter can automatically regulate the corresponding output charging power to 5V/3A. Usually this is marked with: 5V/3A OR 9V/2A OR 12V/1.5A -.Otherwise the defect of the accumulator threatens!

It is important to us that you use our products correctly. For this reason, you will find below step-by-step instructions for the correct use of LIINI®, which can be used with breast milk as well as with formula. If there is something special to consider, you will find a note under the corresponding steps 🙂

General information:

  • Before using the device for the first time, the battery must be charged 100%!
  • DO NOT operate the unit without a baby bottle containing water / breast milk. Otherwise, the circuit board of the unit may be damaged due to the enormous heat. In such a case, any guarantee and warranty claims are excluded.
  • Both the baby bottle and all of the LIINI components (seal and heating plate) must always be cleaned thoroughly BEFORE and AFTER use!
  • If used incorrectly, there may be major differences in temperature ( effective temperature is less than the temperature displayed on the cup warmer)
  • LIINI® is not suitable for this , cold water or cold breast milk out of the fridge to warm up. The battery power is too low for this! If you still want to warm breast milk from the refrigerator, we recommend that you operate the device constantly on the power supply (with the USB charging cable plugged in during the warming up process). Please note that LIINI takes longer for liquids from the refrigerator than a conventional hot water heater for the household.
  • LIINI® is a gadget for parents who On the way are these uncomplicated warming of the baby bottle , no matter where and when , is in the foreground. We put the focus with our products NOT on the speed of heating. Heating too quickly reduces the quality and can even destroy important nutrients!
  • During the warm-up process, the bottle warmer must always stand on a flat surface (e.g. table) for precise warming up
  • LIINI® must never be operated unattended (e.g. overnight!) . We expressly point out that LIINI® is only intended for short-term warming up of baby food, e.g. B. on the go, on a hike or on vacation under adult supervision.

1. Remove the dust cover

The cute bunny ears protect the LIINI® warm-up area from contaminants such as dust and other environmental particles. Before using the bottle warmer, you must remove the dust cover and then clean the warming area or the heating plate with damp water. Under no circumstances should you start LIINI® with your ears still attached. The cup warmer has overheating protection , nevertheless this can destroy the ears or make them unusable.

Warm up LIINI bottles. Remove dust cover
Sealing ring LIINI cup warmer correct installation

2. Check sealing ring

Before using the bottle warmer must be installed correctly of the sealing ring must be checked. The sealing ring prevents liquid from leaking out during the warm-up process. For most baby bottle brands, the sealing ring must be installed as shown in the picture on the left. In this type of installation, the sealing lips point upwards (Lips visible). However, there are baby bottles in which the sealing ring has to be installed in the opposite direction. This is particularly the case with the following brands:

  • CHU CHU
  • Combi
  • HiTo
  • DoubleHeart
  • Lansinoh
  • TUTU
Sealing ring LIINI cup warmer correct installation

3. Screw on the adapter

Next, when using the following baby bottle brands, an adapter must be screwed on:

  • MAM
  • NUK
  • Tommee Tippee
  • All other bottles that have a narrow bottle neck (here the Medela adapter, even if your bottle is not from Medela!)

When screwing the adapter, it is important that it is not tilted and tightened hand-tight.

With all other brands NOT listed above, the baby bottle can be screwed DIRECTLY with LIINI®.

Attach the LIINI baby bottle warmer adapter
Adapter for bottle warmer installed correctly

4. Add breast milk / water

For breast milk: The breast milk should be at room temperature when it is warmed up and can be poured directly into the LIINI® cup warmer.

For powdered milk / breast milk substitute products: When using powder products, the mineral water from the bottle (or the boiled tap water) must now be filled into the baby bottle warmer in the desired amount. The milk powder is not yet added.

After adding the desired bottle contents per meal, the baby bottle can be screwed to the adapter and the bottle warmer.

Babyschoppen Babyflasche mit Wasser füllen
Start the LIINI bottle warmer

5. Start LIINI®

With a longer press on the start button on the underside of the device (approx. 2 seconds) you can now choose between the three temperature levels (37 ° / 40 ° / 45 °).

A short tap on the start button enables the battery level to be displayed.

Start the LIINI bottle warmer

6. Warm breast milk / water

You’re almost there! LIINI® now automatically takes care of reaching the previously set temperature. For warming up, it is important that the LIINI® stands on a parallel surface (e.g. table). The baby bottle warmer must never be upside down while it is being heated!

Important: Our cup warmer has a gentle process to bring the water or breast milk to the desired temperature. This prevents the contents from overheating and losing important nutrients. For this reason, the contents of the baby bottle (breast milk or mineral or tap water) must be kept during the warm-up always have contact with the heating plate. This is the only way to guarantee that the displayed Temperature also corresponds to the effective temperature of the contents.

When LIINI® has reached the desired temperature, beeps the cup warmer. From this point is the baby bottle ready for your baby If you want to wait a little longer before feeding, you can leave the contents in the baby bottle without any problems. The LIINI takes care of maintaining the desired temperature fully automatically.

Bottle warmer for baby on the go

7. Add milk powder

For breast milk: If you are feeding your baby with breast milk, you can now screw the teat onto the baby bottle – done. You managed!

For powdered milk / breast milk substitute products: If you feed your baby with milk substitute products, you can now add the milk powder after the desired temperature has been reached. Please mix everything well!

Milk powder cup warmer
Bottle warmer LIINI Shop without cables

LIINI® Application video

Below you can see in our video how LIINI® is used on the go.

Do you have any other questions?

You will find further helpful information about LIINI® in our FAQs below

LIINI® is a warmer for your baby’s bottle – without annoying cables – for use at home, in a restaurant, with relatives or anywhere else. Thanks to the battery operation, it is now possible to warm up your baby’s food without any hot water.

We recommend the use of LIINI® for baby bottles with a content of up to 200ml. It should be noted that the time it takes to warm up the baby bottle depends on the initial temperature and the size of the contents.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 120ml Baby bottle must be approx. 6 minutes (Our test showed 6 minutes and 7 seconds) with LIINI® until the baby bottle is at 37 ° C.

LIINI bottle warmer 37 ° C bottle warmer

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature extend or r can shorten.

* This measurement of approx. 6 minutes also serves as a reference information on the product packaging and in the operating instructions.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 150ml Baby bottle must be approx. 7 minutes and 30 seconds (Our test showed 7 minutes and 34 seconds) be heated with LIINI® until the baby bottle is at 37 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature extend or r can shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 150ml Baby bottle must be approx. 8 minutes and 30 seconds (Our test showed 8 minutes and 27 seconds) with LIINI® until the baby bottle is at 37 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature extend or r can shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 240ml Baby bottle must be approx. 11 minutes (Our test showed 11 minutes and 22 seconds) be heated with LIINI® until the baby bottle is at 37 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature extend or r can shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 120ml Baby bottle must be approx. 8 minutes (Our test showed 8 minutes and 3 seconds) with LIINI® until the baby bottle is at 40 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature can lengthen or shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 150ml Baby bottle must be approx. 11 minutes (Our test showed 11 minutes and 12 seconds) be heated with LIINI® until the baby bottle is at 40 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature can lengthen or shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 180ml Baby bottle must be approx. 13 minutes (Our test showed 12 minutes and 58 seconds) be heated with LIINI® until the baby bottle is at 40 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature can lengthen or shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. A 240 ml Baby bottle must be approx. 18 minutes (Our test showed 18 minutes and 39 seconds) be heated with LIINI® until the baby bottle is at 40 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature can lengthen or shorten.

For our Reference measurements do we have Tap water with approx. 25 ° C used. One 120ml Baby bottle must be approx. 11 minutes (Our test showed 11 minutes and 2 seconds) with LIINI® until the baby bottle is at 45 ° C.

Important NOTE: Please note that the Warm-up time to the desired temperature due to different Ambient temperatures , the Bottle size (small or large baby bottle), des Bottle material (Glass or plastic) as well as the Starting temperature can lengthen or shorten.

For our reference measurements, we decided on an initial temperature of 25 ° C, because LIINI® is especially a gadget for on the go. As a rule, bottled mineral water or breast milk, stored in a handbag, unrefrigerated (for a short time!) And at approx. 25 ° is used for bottle preparation.

After warming up the bottle, we verified the temperature several times and with various thermometers (digital and analog). The LIINI® cup warmer has one Tolerance of approx. 2 ° C , keeping the specified temperature for the purpose of protecting the baby was only undercut, but never exceeded.

If you want to verify the temperature with another thermometer, you have to proceed as follows:

  • Use the cup warmer to heat the milk to the desired temperature (37 ° / 40 ° / 45 °) until you hear the beep
  • Remove the baby bottle from the LIINI® and mix the contents for 5 seconds (circular hand movements)
  • Now you can check the temperature in the middle of the contents

No! Breast milk or water straight from the refrigerator (around 3-5 °) is not suitable for heating with LIINI®. The battery power is too low for this. LIINI® was designed for traveling, in restaurants or e.g. B. for visiting friends designed.

LIINI® is available in the following two versions:

  • Little Princess
  • Babyboy

Our products have been tested by an independent certification body with regard to environmental and health protection as well as user safety. The products meet all EU requirements. If necessary, the certificate can be requested from us at any time.

RoHS means “Restriction of Certain Hazardous Substances” or in German “Guideline for the restriction of dangerous substances” in the area of electronic devices. The certification confirms that the limit values for environmentally harmful and difficult to dispose of raw materials / materials are complied with.

Our products were dismantled into all individual parts (over 80 parts!). Then each individual part was checked for the permitted limit values. Upon request, this RoHS certificate can be requested from us at any time.

The FCC certification is proof for the American market. It goes without saying that our products also meet US standards. This certificate can also be viewed by us at any time.

No! In the production we use special plastics that absorb the heat. Burning is therefore not possible.

We recommend charging LIINI® once a day.

Absolutely! Only materials that are 100% harmless or non-toxic are used in production. The products are certified.

Definitely! With our milk warmer you can heat both breast milk and powdered milk from different manufacturers. Please note the preparation temperature recommended by the manufacturer (usually 40-45 °).

However, it is important to note that LIINI® is not suitable for heating breast milk from the refrigerator (by around 3 °). The battery power is too weak for this.

LIINI® is very handy with the dimensions 70×70 mm (diameter x height) and fits in every diaper bag.

If you use a baby bottle from the following manufacturers, you can screw it directly to the cup warmer and you DON’T need any adapter:

  • AVENT
  • NIP
  • Chicco
  • Richell
  • CHU CHU
  • Combi
  • HiTo
  • UPIS
  • SpeCtra
  • DoubleHeart
  • Snow Bear
  • Bebe Confort
  • Lansinoh
  • Bobo
  • Yo Yo Monkey
  • Piyopiyo
  • Us Baby
  • Tutu

The sealing ring can be used in two different ways. The installation direction depends on the brand of baby bottle. If you are unsure, you will find an overview below:

Installation direction sealing ring

Depending on the manufacturer, there are different sizes of teats for babies. There are so-called “Wide Neck” (wide bottle neck) and “Small Neck” (narrow bottle neck) versions. You can see the difference in the following picture.

Narrow bottle neck and wide bottle neck LIINI cup warmer

How to find the perfect ring size

Do you already have another ring at home?

Yes - measure ring

If you already have a good fitting ring, you can use that to determine the size.

Step 1: Prepare material

  • An existing ring that fits well
  • A ruler or tape measure
  • A pen and a sheet of paper

Step 2: Measure the existing ring

Lay the existing ring flat on a flat surface. Make sure that it does not deform or twist. Use the ruler or tape measure to measure the inside diameter of the ring. This is the distance from one inner edge to the opposite inner edge of the ring. Note the measurement in millimeters.

Step 3: Compare with our size chart

Now compare the measurement you noted with our size scale and choose the appropriate ring size.

No - Measure finger

If you don’t have a matching ring at home, you can easily determine your size with the following procedure.

Step 1: Prepare material

  • A thin strip of paper or a piece of string
  • A pen
  • One pair of scissors
  • A ruler or tape measure

Step 2: Measure the circumference of the finger

Wrap the thin strip of paper or string around the finger you want to wear the ring on. Make sure the strip fits snugly, but not too tight or too loose. Use a pencil to mark the place where the strip or string overlaps.

Step 3: Check the size

To make sure that the determined ring size is correct, you can wrap the thin paper strip or string around your finger again and place the ring on it. Check that it fits comfortably and is not too loose or too tight. Repeat this step if necessary to find the optimal size.

Tip: If you want more accurate measurements, you can repeat the process several times and take the average of the measurements.

Step 4: Compare with our size chart

Now compare the measurement you noted with our size scale and choose the appropriate ring size.

Size chart

SizeInner diameter
116.5 mm
217.3 mm
318.1 mm

LIINI® Ring template

Don’t worry too much about your ring size.

After your order you will immediately receive our LIINI fingerprint kit.

Included are original and pre-cut ring templates to try on.

So you can always change to a smaller or larger ring before engraving in the worst case.