​Fresh formula feeds on-the-go: One flask stores boiling water, and the other quickly cools a feed to the perfect temperature in just two minutes* ​ Easy-to-read digital display: The star on the flask lid tells you if the formula milk inside is too hot. When the star turns blue, you know their feed is ready​ Follows NHS guidelines: The PrepGo flask makes fresh formula feeds with boiling water to kill any bacteria, then cools it down to the perfect temperature​ Easy to clean: Wash your flask in warm soapy water to clean and sterilise with 240ml of boiling water. Secure the lid and shake for 10 seconds. Stand upright for two minutes, then upside down for a further two​ BPA free: For total reassurance and peace of mind, the PrepGo Formula Feed Maker flasks and milk powder dispensers are completely BPA free