Preparing infant formula correctly is one of the most vital daily tasks for parents of newborns. Because a newborn’s immune and digestive systems are still developing, even minor errors in hygiene, water temperature, or powder measurement can lead to discomfort or health risks. To prepare and store NAN Stage 1 formula safely, you must strictly adhere to a sterile preparation routine, use the exact water-to-powder ratio specified on the product label, and follow precise storage timeframes. This guide outlines the step-by-step process to ensure your baby receives safe, consistent nutrition with every feed.
Essential Preparation and Sterilization Steps
Before you begin handling any feeding equipment, establishing a clean environment is paramount. Start by thoroughly washing your hands with soap and warm water for at least twenty seconds, ensuring you clean under your fingernails and between your fingers. Dry your hands with a clean, single-use paper towel or a dedicated clean cloth to avoid recontaminating them. Clean the countertop or preparation surface with hot, soapy water or a food-safe sanitising spray, wiping it dry before placing any sterilised items down.
All feeding equipment—including bottles, teats, collars, caps, and any tongs used to handle them—must be thoroughly sterilised before every use. You can use a dedicated electric steam steriliser, a microwave steriliser, or the traditional boiling method, always following the manufacturer’s instructions for your specific sterilising device. If boiling, ensure all components are fully submerged in boiling water for the duration recommended by the equipment manufacturer. Once sterilised, leave the items inside the closed steriliser or place them on a clean, sanitised surface using sterilised tongs to prevent contamination from your hands.
Products mentioned in this guide
![Nestle NAN SupremePro H.A. Stage 1 Starter Infant Formula 800G - From 0-6 Months [Lids may vary]](https://img.lazcdn.com/g/p/79c2898e3d669584bc15cf20538fb820.jpg_400x400q80.jpg_.webp)
249 Lazada user ratings
Repurchase here multiple times as delivery is next day and free. Came in good condition and nicely packed as well.
Fast and convenient place to get formula milk. Always come nicely packed. Expiry long enough 2025
Convenient to get and delivery is free and fast. Always come nicely packed. Expiry 2025.
received in a good packaging. easy delivery and not easy to find in supermarket
Received item in a timely manner, but packaging damaged.
![[Ready Stock] Nestle NAN SupremePro 1 Premium Starter Infant Formula (800g) Supreme Pro Newborn Baby Formula Milk Powder Stage 1](https://img.lazcdn.com/g/p/b072c3df1fe156c49ff2f85944de4e87.jpg_400x400q80.jpg_.webp)
47 Lazada user ratings
received the item in good condition. haven't open the box to check on expiry. baby have tried a few brands and still prefer this without vom…Read full reviewShow less
received the item in good condition. haven't open the box to check on expiry. baby have tried a few brands and still prefer this without vomitting or too much gas. more expensive but well worth the investment
received the product in great condition. have bought before and received it quickly and well packed. very satisfied and will definitely buy …Read full reviewShow less
received the product in great condition. have bought before and received it quickly and well packed. very satisfied and will definitely buy again.
Not my first time purchasing. Price very well and babies love the milk. Easy to prepare and feed. Long expiry! Will buy again soon!
📄Nutritional Value: Supports healthy development, Gentle on baby's tummy, Recommended for babies aged 0-3 months,
Item was true to picture :)
![Nestle NAN SupremePro 1 [Ready Stock 6 Cans New Packaging] Premium Starter Infant Formula (800g) Supreme Pro Newborn Baby Formula Milk Powder Stage 1 Made in Germany](https://img.lazcdn.com/g/p/32f4d332915b27e0196ce9e08b426596.jpg_400x400q80.jpg_.webp)
457 Lazada user ratings
No problem for my baby, good price and milk powder dissolves fully. Each spoon is 30ml water so it’s easier to portion
Provides essential nutrients, Trusted brand, perfect for newborn so far so good. Delivery and packaging is good
Perfect for newborns, Promotes healthy growth, increases immunity and gentle on the tummy. Suitable for baby
Received in good condition. Must order earlier if not delivery takes quite a while.
Well packed , fast delivery and brought during offer. will buy more again
![[Ready Stock] Nestle NAN OPTIPRO 1 Premium Follow-on Formula (800g) From 0 to 6 Months Premium Milk Drink Baby Formula Milk Powder Exp date: Apr 2027 [Made in Netherlands]](https://img.lazcdn.com/g/p/6f825add070087b04a8523858cba90af.jpg_400x400q80.jpg_.webp)
Prices are valid at publication and may change. Please refer to the product page for the latest price.
Before opening a new tin of NAN Stage 1 formula, inspect the packaging carefully. Check that the outer plastic seal is intact and that the metal tin has no dents, punctures, rust, or signs of swelling, which could indicate a compromised seal. Always locate the expiry date printed on the bottom or side of the tin to ensure the product is fresh and safe for consumption. If you notice any damage to the tin or if the product has passed its expiry date, do not use it and contact the retailer or manufacturer for guidance.
Step-by-Step Guide to Mixing NAN Stage 1 Formula
To begin the mixing process, fill your kettle with fresh, cold tap water. Avoid using water that has been boiled previously, as re-boiling can concentrate minerals. Bring the water to a rolling boil, then allow it to cool in the kettle. You must check the product label on your specific tin of NAN Stage 1 to find the exact recommended cooling time or target water temperature, as this ensures the water is safe for mixing without damaging the formula’s nutritional components.
Once the water has cooled to the temperature specified on the label, pour the exact volume of water required for the feed into your sterilised bottle. Always measure the water level at eye level on a flat surface to ensure accuracy. It is critical to add the water to the bottle first, before adding any powder, to maintain the correct concentration of nutrients and fluid.
Next, locate the scoop provided inside the tin of NAN Stage 1. Use only this specific scoop, as scoop sizes vary between different brands and stages of formula. Dip the scoop into the powder and fill it loosely, then level it off using the flat edge of a sterilised knife or the built-in leveler on the tin’s rim. Do not press, pack, or heap the powder into the scoop, as this adds excess formula and alters the required concentration.
Carefully pour the measured scoops of powder into the water-filled bottle, following the feeding table on the tin for your baby’s age or weight. Secure the sterilised teat and cap onto the bottle tightly. Gently shake or swirl the bottle until the powder is completely dissolved and no clumps remain at the bottom. Avoid shaking the bottle too vigorously, as this can introduce excessive air bubbles into the milk, which your baby might swallow, potentially leading to gas, colic, or spit-up.
Understanding Water Temperature and Powder Ratios
Maintaining the exact water-to-powder ratio is crucial for your newborn’s health. Infant formula is carefully balanced to mimic the nutritional profile required for early development. If you add too much powder, the concentrated mixture can strain your baby’s developing kidneys and lead to dehydration or constipation. Conversely, adding too little powder dilutes the formula, meaning your baby will not receive enough calories, vitamins, and minerals, which can lead to poor weight gain and malnutrition over time.
The temperature of the water used for mixing plays a dual role in safety and nutrition. The water must be warm enough to dissolve the powder effectively and, depending on specific preparation guidelines, help eliminate potential environmental bacteria that may be present in the powder. However, using water that is too hot can destroy heat-sensitive nutrients, such as essential vitamins and beneficial active cultures. Always refer to the instructions on your NAN Stage 1 tin to verify the correct temperature range that balances safety with nutrient preservation.
Before offering the prepared bottle to your baby, you must always test the temperature of the milk to prevent burns. Shake a few drops of the mixed formula onto the inside of your wrist. The skin on your wrist is highly sensitive and provides an accurate gauge of how the milk will feel to your baby. The formula should feel lukewarm or neutral—neither hot nor cold. If it feels hot, let the bottle cool further by placing it in a bowl of cold water or holding it under a running cold tap before testing it again.
Storage Time Limits for Prepared Bottles and Opened Tins
Once a bottle of NAN Stage 1 formula has been prepared, strict time limits apply to prevent the growth of harmful bacteria. If kept at room temperature, a freshly mixed bottle should be used within the timeframe specified by the manufacturer, which is typically within two hours of preparation. Bacteria thrive in warm, nutrient-rich environments, so leaving a bottle out on the counter for longer than recommended increases the risk of contamination.
If you do not plan to feed your baby immediately, you can store the prepared bottle in the refrigerator. Place the sealed bottle near the back of the main fridge compartment, where the temperature is most consistent, rather than in the door shelves, which experience temperature fluctuations when opened. Refer to the product label to verify the maximum refrigeration limit, which is generally up to 24 hours. Any refrigerated bottle must be discarded if it is not consumed within this designated window.
Managing the opened tin of powder requires special attention, particularly in Singapore’s warm and highly humid climate. High humidity can introduce moisture into the tin every time it is opened, leading to clumping, spoilage, or bacterial growth. Store the opened tin in a cool, dry place away from direct sunlight, such as a pantry cabinet, and ensure the plastic lid is sealed tightly after every use. Do not store the powder in the refrigerator, as the condensation that forms when taking the tin out can ruin the powder. Check the label for the manufacturer’s instruction on how quickly the powder must be consumed after opening, which is typically within three to four weeks.
Common Preparation Mistakes and When to Stop
One of the most common mistakes parents make is attempting to customise the formula mixture. This includes adding extra scoops of powder to make the feed “richer” or adding extra water to make the tin last longer. Always stick strictly to the manufacturer’s feeding guide unless a pediatrician has explicitly instructed otherwise. Additionally, never use unboiled tap water or water from unverified sources, as a newborn’s immune system is highly vulnerable to waterborne pathogens.
Another critical error is using a microwave to warm prepared formula bottles. Microwaves heat liquids unevenly, creating “hot spots” in the milk that can severely burn your baby’s mouth and throat, even if the outside of the bottle feels cool. Instead, warm the bottle by placing it in a bowl of warm water or using a dedicated bottle warmer, ensuring you shake the bottle well and test the temperature on your wrist afterward.
You must discard formula immediately if you observe any signs of spoilage. This includes an unusual or sour smell, persistent clumping that does not dissolve, or if the powder has changed colour. If your tin has passed its expiry date or the recommended post-opening duration, dispose of it safely.
Always monitor your baby during and after feeds. If your baby exhibits signs of feeding issues, such as excessive spitting up, vomiting, severe gas, unusual stool changes, skin rashes, or persistent crying after feeding, stop using the formula and consult a pediatrician or qualified healthcare professional immediately to rule out allergies or intolerances.
Frequently Asked Questions (FAQ)
Can I prepare NAN Stage 1 formula in advance for night feeds?
Yes, you can prepare bottles in advance to make night feeds more manageable, provided you follow strict safety protocols. After mixing the formula with boiled and cooled water according to the label instructions, cool the bottle rapidly by placing it under cold running water or in an ice bath. Once cooled, store the sealed bottle immediately in the back of your refrigerator. When your baby wakes, warm the bottle using a bottle warmer or a bowl of warm water for no longer than fifteen minutes, test the temperature on your wrist, and feed immediately. Do not store pre-prepared bottles for longer than the manufacturer’s recommended refrigeration limit, and never freeze prepared formula.
What should I do if my baby doesn't finish the bottle?
If your baby does not finish a prepared bottle within the feeding session, you must discard the remaining milk. When your baby sucks on the teat, bacteria from their mouth travel back into the bottle, mixing with the warm milk. This creates an ideal breeding ground for bacteria to multiply rapidly. To protect your baby from potential digestive upset or infection, never save, refrigerate, or reheat partially consumed formula for a later feed.
Is it safe to use bottled or filtered water for NAN Stage 1?
If you choose to use bottled or filtered water, you must still boil it before preparing the formula. While bottled water may seem clean, it is not sterile, and filtering tap water does not eliminate all microscopic pathogens. Bring the bottled or filtered water to a rolling boil and let it cool according to the label instructions. Additionally, if using bottled water, check the label to ensure it has a low mineral content, as high levels of sodium or sulfate can place an unnecessary strain on your newborn’s kidneys.
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