Can the digital lid be fully submerged in water

I was cleaning it with cold sterilisation as required and after that the lid stopped working (showed only a blue star all the time)

Can breastmilk be use in either of these?

I would say black flask it keeps it right temperature comes out as

How can I tell how much hot water I am using

There is a dial in it that you can fill it up to holds up to 8oz of water

Has anyone mastered the art of screwing the digital top onto the black flask to test that the water is hot enough to make a feed?

No!! I have only managed it once without hot water leaking all over me 😪 But have found that the water does stay hot enough in the black flask for atleast 3 hours (tested with a non contact thermometer in the early days). So now just generally pour into the white flask and use if within 3/4 hours.

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PrepGo Formula Feed Maker Set, Portable Hot and Cool Flasks with LED Digital Temperature Display, Travel Friendly Bottle Preparation in 2 Minutes

PrepGo Formula Feed Maker Set, Portable Hot and Cool Flasks with LED Digital Temperature Display, Travel Friendly Bottle Preparation in 2 Minutes

Product ID: 516009877

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⏱️2-minute feed prep

♻️BPA-free safe materials

🌡️LED temp display

Description

🌟 Prep like a pro, feed like a boss!

DUAL FLASK DESIGN - One flask boils water to kill bacteria, the other cools it down quickly, following NHS safety guidelines.
EFFORTLESS STERILIZATION - Clean and sterilize your flask easily with a simple shake and warm soapy water routine.
RAPID READY IN 2 MINUTES - Get fresh formula feeds faster than ever, perfect for busy on-the-go parents.
SMART LED TEMPERATURE STAR - Instant visual cue ensures your baby's feed is always at the ideal temperature—no guesswork.
TRAVEL OPTIMIZED PORTABILITY - Compact, lightweight, and BPA-free—designed for the modern parent who never slows down.

The Tommee Tippee PrepGo Formula Feed Maker Set revolutionizes on-the-go baby feeding with its dual-flask system that boils and cools formula in just 2 minutes. Featuring an intuitive LED temperature display and BPA-free materials, it ensures safe, fresh feeds anytime, anywhere—perfectly aligned with NHS guidelines and designed for busy parents who demand speed, safety, and convenience.

Specifications

Model Number	423774
Batteries	1 Lithium Metal batteries required. (included)
Item model number	423774
Material composition	PP, ABS and Silicone
Style	GoPrep Kit
Batteries required	No
Item Weight	1.02 kg

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