Help and FAQs
RapidCool
Why is my RapidCool always green?
Oh no! We know the RapidCool is a total lifesaver during feed time, so we're sorry to hear its digital lid is playing up. Let's get you back to happy, speedy feeding in a flash!
Sometimes the lid just needs a quick reboot. Could you give this little test a try for us? (Just make sure the flask is empty and has fully reset first!)
Let's test the lid:
Pop 180ml of boiling water (straight from the kettle) into the flask.
Secure the lid, give it a good shake, and then flip it upside down for 10 seconds. This lets the water meet the thermostat, and the lid should glow amber.
Stand the flask upright and set a timer for 4 minutes.
Flip it upside down again for another 10 seconds. The lid should now be shining green!
Did that do the trick? (Remember to always give it a good flip so the water can reach the thermostat inside the lid!)
If it's still not playing nice, our tech whizzes will need to investigate. So we can get this sorted for you ASAP, could you please send these details our way?
A quick photo of the digital lid
A short video showing the lid not turning amber after you've added boiling water and flipped it
Your proof of purchase
Your postage address and phone number
The batch number from the base of the flask (it starts with the letter H)
Once we have all that, a friendly face from our customer service team will be in touch with the next steps!
You can contact our customer service team on 97069057 or email us support@nuby.com.au
Why is my RapidCool not cooling?
When your flask isn't cooling properly, it's almost always a sign that it hasn't had enough time to rest and recharge its cooling magic after its last use.
The Golden Rule: Let it Reset!
Giving your flask a proper break is the secret to its speedy cooling. Here are a few tips to make sure it's always ready for action:
Give it a Breather: Heat is what activates the cooling material inside. Once it’s done its job, it needs to recover. If you use it again too soon, it won't cool things down properly. A minimum of 3 hours rest is essential.
Washing Up: We recommend washing your flask in warm water only. Super hot water can kickstart the cooling process when you don't want it to, meaning it will need another 3 hours to reset.
Sterilising: Cold water or UV sterilising are totally fine. If you steam sterilise, just make sure you wait at least 4 hours before its next use.
Let's run a quick check-up!Before you start, please make sure the flask has had a good long rest (at least 3 hours) and is completely empty.
Pop 180ml of boiling water (straight from the kettle) into the flask.
Secure the lid, give it a good shake, and then flip it upside down for 10 seconds. The lid should glow amber.
Stand the flask upright and set a timer for 4 minutes.
Flip it upside down again for another 10 seconds. The lid should now be shining green!
Pour the water into a bottle and do the all-important wrist test to check the temperature.
The water should now be at a safe and perfect temperature. If you've run this test and you're still concerned, please get in touch with our team and provide the following info so we can get it sorted for you ASAP:
Your proof of purchase
Your postage address and phone number
The batch number from the base of the flask (it starts with the letter H)
My RapidCool feels hot to touch?
When the flask feels too hot to touch, it's almost always a sign that it hasn't had enough time to rest and recharge its cooling magic after its last use.
The Golden Rule: Let it Reset!
Giving your flask a proper break is the secret to its speedy cooling. Here are a few tips to make sure it's always ready to go:
Give it a Breather: Heat is what activates the cooling material inside. Once it’s done its job, it needs to recover. If you use it again too soon, it won't cool things down properly and can get too hot to hold. A minimum of 3 hours rest is essential.
Washing Up: We recommend washing your flask in warm water only. Super hot water can kickstart the cooling process when you don't want it to, meaning it will need another 3 hours to reset.
Sterilising: Cold water or UV sterilising are totally fine. If you steam sterilise, just make sure you wait at least 4 hours before its next use.
Let's run a quick check-up!Before you start, please make sure the flask has had a good long rest (at least 3 hours) and is completely empty.
Pop 180ml of boiling water (straight from the kettle) into the flask.
Secure the lid, give it a good shake, and then flip it upside down for 10 seconds. The lid should glow amber.
Stand the flask upright and set a timer for 4 minutes.
Flip it upside down again for another 10 seconds. The lid should now be shining green!
Pour the water into a bottle and do the all-important wrist test to check the temperature.
The water should now be at a safe and perfect temperature. If you've run this test and you're still concerned, please get in touch with our team and provide the following info so we can get it sorted for you ASAP:
Your proof of purchase
Your postage address and phone number
The batch number from the base of the flask (it starts with the letter H)
Option 2 (Short, Snappy & Direct)
Bummer! Your RapidCool feeling hot is definitely not part of the plan. Let's get this sorted.
The most common reason for this is that the flask needs a bit more downtime to reset its cooling powers between uses.
The #1 Tip: Give it a 3-hour break!
Your RapidCool needs at least 3 hours to recover after each feed. Keeping it out of the sun and washing it in warm (not hot!) water also helps it stay ready for action.
Still concerned? Let's do a quick test.(Make sure your flask has rested for at least 3 hours and is empty first!)
Add 180ml of boiling water.
Shake and flip for 10 seconds (should turn amber).
Wait 4 minutes.
Flip again for 10 seconds (should turn green!).
Pour it out and do a wrist test.
If you've followed the reset rules and the test still isn't right, please send the following details to our customer service team, and they'll take care of you:
Proof of purchase
Your address and phone number
The batch number (starts with H) from the bottom of the flask
Why is my digital lid always red?
We know how much of a lifesaver the RapidCool is, so let's get this sorted for you ASAP.
It sounds like there might be a technical issue with your lid, but don't worry! To help our tech whizzes figure out what's going on, could you please pop an email us at support@nuby.com.au with the following details.
A short video of you tapping the lid and it showing red
Your proof of purchase
Your postage address and the best phone number to reach you on
The batch number from the base of your flask (it's the one that starts with an H!)
Once we have that, one of our friendly team members will get in touch to let you know the next steps. We'll have you back to happy, speedy feeding in no time!
Why is my lid green but the formula still feels too hot?
Usually, if the lid shows green but the feed still feels too warm, it’s because the water hasn't had quite enough contact with the thermostat inside the lid to get an accurate reading.
Let’s run through a quick check to make sure everything is working as it should:
The Key is the Flip: For the lid to give an accurate reading, it needs a good, confident flip upside down for 5-10 seconds. This allows the hot water to make proper contact with the thermostat. If it stays green after a second flip, the feed should be ready. If it switches back to amber, it just needs a little more time to cool.
The Golden Rule: No matter what the lid shows, always test the temperature of the feed on the inside of your wrist before giving it to your little one. This is the most important final safety check.
If you've tried this and you're still concerned about the temperature, please contact our customer service team with the following details so we can investigate further for you:
A quick description of the issue
Your postage address and phone number
The batch number from the base of the flask (it starts with the letter H)
Email us at support@nuby.com.au
Digital lid is not showing any colour!
Oh no! A sleepy lid is the last thing you need when you've got a hungry little one. We know how much of a lifesaver the RapidCool is, so let's get it shining again for you in a flash.
It sounds like there might be a technical glitch, but don't worry! To help our tech whizzes figure out what's going on, could you please pop an email to support@nuby.com.au with the following bits and pieces?
A short video of you tapping the lid and it not lighting up
Your proof of purchase
Your postage address and the best phone number to reach you on
The batch number from the base of your flask (it's the one that starts with an H!)
Once we have all that, a friendly face from our customer service team will be in touch with the next steps. We'll have you back to happy, speedy feeding in no time!
Why does RapidCool use freshly boiled water? Is it safe for my baby?
Yes — and it's actually an important part of how RapidCool works.
RapidCool is designed to prepare formula using freshly boiled water, in line with WHO (World Health Organization) guidelines. Using freshly boiled water is recommended to eliminate harmful bacteria that can be present in powdered infant formula.
Here's how it works: as soon as the boiled water enters the RapidCool flask, the cooling process begins immediately. The flask is specifically engineered to rapidly cool the water to a safe feeding temperature, so you're not waiting long and your baby isn't receiving formula that's too hot.
In short — RapidCool gives you the safety of freshly boiled water with the speed and convenience of a rapid cooling system. The best of both worlds.
If you have further questions about how RapidCool works or want to know more about safe formula preparation, feel free to contact our team at support@nuby.com.au and we'll be happy to help.
Does RapidCool protect the nutritional value of formula?
Yes - and it's one of the things that makes RapidCool genuinely different.
A common concern among parents is that adding boiling water to formula powder may degrade some of its heat-sensitive nutrients. RapidCool is specifically designed to address this.
The moment boiling water comes into contact with the RapidCool flask, the flask begins absorbing and dissipating heat immediately. This rapid heat transfer process means the water temperature starts dropping right away — which helps minimise the time formula powder is exposed to high temperatures and supports better nutrient retention compared to preparing formula in a standard bottle or jug.
So while freshly boiled water is still used (as recommended by WHO guidelines to eliminate harmful bacteria in powdered infant formula), RapidCool works to cool it as quickly as possible — striking the right balance between safety and nutritional care.
In summary:
- Freshly boiled water eliminates harmful bacteria — keeping your baby safe
- RapidCool's immediate heat absorption minimises exposure to high temperatures — supporting nutrient retention
- The result is formula that is both safely prepared and rapidly cooled to feeding temperature
If you'd like to know more about how RapidCool works or have further questions about formula preparation, our team is happy to help at support@nuby.com.au.
What is the memory feature?
RapidHot remembers your last feed size and settings, so during those half-asleep 3am feeds, you don't need to think. Just press and go.
RapidSteriliser
How does RapidSterilise work?
RapidSterilise uses UV light to kill 99.9% of bacteria in minutes... no boiling water, no steam, no harsh chemicals. Simply used with your RapidBottle or RapidCool, press the button, and let the UV light do the work.
How long does sterilisation take?
A full sterilisation of RapidBottle takes 2 minutes, run as two 1-minute cycles to ensure all internal surfaces are treated. Sterilising RapidCool takes just 1 minute with a single-step process. Combined with RapidCool, you can be ready to make a feed in as little as 3 minutes.
How do I fit RapidSterilise to RapidBottle or RapidCool?
Just sit it on top no screwing required. For RapidCool, place RapidSterilise on top, cover with your RapidCool digital lid and press start. For RapidBottle, place the teat (without the screw ring) upside down in the electroplated bottle cap, sterilise for 1 minute, then repeat with the teat and screw ring together for the second cycle.
Can I use RapidSterilise with other brands of baby bottles?
RapidSterilise is designed to fit RapidBottle only. RapidBottle caps feature a special electroplated coating that reflects UV light evenly around the teat to ensure effective sterilisation. Other bottles may result in an insecure fit and reduced performance.
Do I need to clean bottles before sterilising?
Yes. Always clean bottles first to remove any milk residue, and make sure all parts are completely dry before placing them on the unit, moisture will damage the device.
How do I clean RapidSterilise?
Wipe clean with a damp cloth and leave open to dry. Don't soak or submerge it in liquid, and avoid bleach or harsh cleaning agents.
How many uses do I get per charge?
Up to 30 uses per charge. Recharge using the supplied USB-C cable and you're ready to go again, perfect for keeping in the nappy bag for on-the-go sterilising.
How long do I need to wait to use RapidCool after sterilising?
RapidCool requires 3 hours to reset after contact with heat. Since RapidSterilise doesn't emit heat, sterilising won't affect the reset process, just wait 3 hours from your last feed or hot water wash before using RapidCool again.
RapidBottle
Is RapidBottle BPA-free and safe for my baby?
Yes. RapidBottle is made from durable borosilicate glass and is free from BPA and phthalates. All materials meet strict safety standards for infant feeding products, and the design ensures milk flow never touches plastic, giving you added peace of mind with every feed.
Can the glass break or get scratched?
Borosilicate glass is more durable than standard glass, but like any glass bottle, it can break if dropped or knocked. The soft-touch silicone coating should be cleaned gently to avoid surface scratching, minor marks won't affect performance. Avoid over-tightening the screw ring as this can cause leaks, and if the glass bottle itself ever leaks, stop using it immediately as this may indicate a crack.
Is RapidBottle dishwasher or microwave safe?
No, hand wash only using warm soapy water. Dishwashers and microwaves can damage the silicone coating, electroplated cap and bottle finish.
How do I sterilise RapidBottle?
The fastest way is with RapidSterilise, which sterilises the bottle and teat in just 2 minutes using UV light, no steam, no waiting. Alternatively, all components can be sterilised via UV or cold water sterilisation. The bottle, screw ring and teat can also be steam sterilised — but never steam sterilise the cap, as this will damage the electroplated coating inside.
Why does the cap look metallic inside?
That's the electroplated coating, and it's doing an important job. It reflects UV light evenly around the inside of the cap during sterilisation, making sure every surface of the teat is treated. It's also why the cap should never be boiled or steam sterilised.
Which teats are compatible, and what flow rates are available?
Only Nuby RapidBottle teats are compatible, using other teats may affect the fit and increase the risk of detachment during feeding. A slow flow teat is included with your bottle, with medium and fast flow teats available separately as your baby's feeding needs grow. All teats are made from food-grade silicone.
Does RapidBottle help with colic?
RapidBottle features three advanced anti-colic valves that draw air away from your baby's milk during feeds, helping reduce the air intake that can contribute to colic symptoms. The gradually sloped teat also supports a natural, deep latch, making feeding feel more natural and helping babies transition between breast and bottle.
Are the bottles heavy?
Glass bottles are naturally heavier than plastic, but RapidBottle is lighter than many other glass bottles on the market. Each 270ml bottle weighs approximately 219g, and the soft-touch coating makes it comfortable to hold through every feed.
How do I care for RapidBottle before first use?
Before first use, the bottles and teats can be placed in boiling water for up to 5 minutes, but do not boil the caps, as this will damage the electroplated finish. After first use, stick to UV, steam (bottle and teat only) or cold-water sterilisation, and always make sure all parts are fully dry before reassembling.
RapidHot
How does RapidHot work?
Do I have to use RapidHot with a RapidCool, or can I use a regular bottle?
Why does RapidHot use boiling water?
Boiling water is recommended under WHO guidelines for preparing infant formula, as it eliminates harmful bacteria that can be present in formula powder. RapidHot makes this easy by dispensing precise, filtered boiling water on demand, then RapidCool takes over to rapidly cool the feed to serving temperature.
What feed sizes and temperatures does RapidHot dispense?
Can I use RapidHot for anything other than formula?
Absolutely. Tap boiling for a cup of tea, or select room temperature for an instantly filtered drink. Consider it a bonus for the whole household.
Why is my machine flashing and showing 000?
A flashing display with 000 means it's time for a filter change, follow the instructions in your user manual. If the display shows 000 without flashing, the tank is empty or low; fill it with at least 600ml of water.
How often do I need to change the filter?
One filter lasts up to 4 weeks of regular use. The machine will alert you when it's time to swap it out. Continuous flashing of the child lock icon means both descaling and a filter change are needed.
How do I descale RapidHot?
When the child lock icon flashes continuously, remove the filter and filter holder, pour 250ml of white vinegar into the tank with 750ml of water, and run boiling water cycles until the tank is empty. Then flush with 300ml of fresh water before use. Full step-by-step instructions are in your user manual.
How long has the water been in the tank, does it matter?
If water has been sitting in the tank for more than 48 hours, discard it and refill with fresh water before use.
The dispensed water amount seems slightly off, is that normal?
Yes. Like all manufactured products, RapidHot has an allowed accuracy tolerance of +/- 5% on dispensed volume, and bottle measurement markings have their own tolerance too. The combination of both can make the volume appear slightly different than expected, this is normal and won't affect your feed.
Other Products
Do you sell replacement parts?
Yep, we do replacement parts. Just pop an email to our team at support@nuby.com.au, and we'll help get your favorite goodies back in action.
What if I can’t find the replacement part that I’m looking for?
Not all our replacement parts are listed online. If you’re looking for something more specific or unsure which part you need, please reach out to our customer services team and they will be able to point you in the right direction. You can call them on 97069057 or email them at support@nuby.com.au
About Nuby
Where can I find Nuby products in Australia?
Looking for a splash of Nuby fun? ✨ You’re in luck! Find our goodies online at amazon.com.au or spot us on the shelves at your faves: Baby Bunting, Chemist Warehouse, BigW, Coles, Woolworths, Direct Chemist, and Ramsay Pharmacy.
Can I open a trade account?
Ready to bring a little more fun to your shelves? To get started with a Nuby trade account, just email our team at accounts@nuby.com.au. They'll happily walk you through everything you need to know!
Material
Do Nuby products contain harmful materials?
We're super serious about safety so you don't have to be! We work closely with our production facilities to make sure every product is top-notch, giving you one less thing to worry about while you're looking after your little one. Rest assured, all our goodies meet the latest and strictest Australian safety standards, so you can get back to the fun stuff.
What is BPA?
Let's chat about the yucky stuff (so you don't have to!). You've probably heard the buzz about a chemical called BPA.
Well, you won't find any of that here! All our goodies are 100% BPA-free. We're all about making awesome, super-safe products that meet Australia's strict standards, giving you total peace of mind. Now, back to the fun stuff!
For more official info, we recommend visiting Food Standards Australia New Zealand (FSANZ) or Product Safety Australia.
