How to prepare baby formula milk

Bottle-feeding is a great time to bond with your little one. And because we’re here to support you on your feeding journey, we’ve got you covered with our top tips on how to prepare your baby’s formula. 

🍼 What do I need to bottle-feed my baby? 🍼

✔️ Sterilised bottles with teats and bottle covers (we have a pack of 5 sterilised bottles for when you’re out and about!)

✔️ A clean bottle brush and teat brush

✔️ Baby formula (we recommend Kendamil, naturally)

⌚ Can I prepare my baby formula in advance? ⌚

Ideally, you should be making up a bottle just before you feed. Storing or freezing formula is not recommended. 

The prepared formula is good for 2 hours at room temperature if unused, and 1 hour once feeding has begun. Make sure to throw away any remaining formula.

How do I sterilise my equipment before making up my bottle?

It’s really important that you sterilise the equipment before making your baby’s bottle to prevent your little one getting poorly. According to the NHS, you should be doing this until your baby is at least 12 months old (1).

Before sterilising, make sure to thoroughly clean your bottles, teats and other feeding equipment in hot, soapy water as soon as possible after feeding. Use dedicated brushes to clean out bottles and teats (you can also turn out teats to wash them). You can also clean equipment in the dishwater, but note that this does not sterilise them either.

Once everything is clean, you can start sterilising. There are three main ways to sterilise; cold water sterilising, steam sterilising and sterilising by boiling.

  • Cold water sterilising is when you use a special solution to and soak the equipment in it for at least 30 minutes. The solution should be changed every 24 hours.
  • You can also use a steam sterilizer. Make sure to follow the manufacturer's instructions and that the openings of the bottle and teats face downwards in the steriliser. 
  •  To sterilise with boiling water, make sure that the items are safe to sterilise in this way. You can then boil them in a large pan of boiling water for 10 minutes, making sure they stay under the surface. 

After you’ve sterilised your equipment 

Leave equipment in the steriliser or pan until you need them. When you do take them out, put the teats on the bottles immediately. Always wash and dry your hands before handling the equipment, and assemble everything on a clean, disinfected surface.

7 simple steps to making up your baby’s bottle: 

Preparing formula:

  1. Boil fresh* tap water in a kettle.
  2. After the water has boiled, make sure it cools to a temperature of at least 70°C. The water typically reaches this temperature approximately 30 minutes after boiling. We recommend using a thermometer like this one to double check the temperature.
  3. Measure out the recommended amount of cooled water as detailed by the instructions on your can of formula. It should be measured out in a sterilised bottle.
  4. Using the scoop provided by the formula manufacturer, the corresponding amount of powder should be added to the water in the bottle. Scoops should be leveled off using a sterilised knife (or the powder leveler that comes with the formula tin). Don’t pack the formula down. Be careful not to get the scoop wet, especially if you put it back into the powdered formula container.
  5. A sterilised teat and teat cap should then be placed on the bottle. Shake the bottle to mix. Some formulas (like Kendamil) might be quite frothy. You can stir the formula in the bottle with a sterilised utensil, or gently rotate the bottle in a stirring motion instead of shaking it. 
  6. You then need to cool the milk once more so it is not too hot for the baby to drink. Body temperature is ideal (36.5–37.5°C) for feeding. You can speed up the cooling process by running the bottle under cold running water (while keeping the teat cap on the bottle so the teat does not get wet), or placing the bottle in a bowl of ice or cold water. 
  7. You should then  test the temperature of your formula on your wrist, to make sure it's not too hot. 

If you’re a visual learner, then we’ve got you covered. Follow along with our Brand Ambassador Mary as she takes you through the steps to preparing your baby’s formula bottle, from what equipment you’ll need to one method of sterilising and the mixing process.

And don’t worry, it might seem like a lot to remember to begin with, but you’ll learn the steps really quickly. Soon you’ll be a pro at preparing formula! 


(1) NHS, Sterilising baby bottles,


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