Just swap out the RapidHot filter for a fresh one, and voilà – your RapidHot is back in action, helping you make the perfect baby bottle at the touch of a button. RapidHot filters remove unwanted impurities in the water – no impurities, no worries. Just safe, clean, filtered water ready to make your baby’s next formula feed. One filter lasts for up to 4 weeks*, that’s 4 weeks of easy-peasy stress-free feeding. No need to pop it in your diary, your RapidHot will let you know when it’s time for a new filter, so you can simply swap it for a new one and you’re ready to go again. Contains: 6 replacement filters How to change your filter: 1.       Submerge the filter into a bowl of cold tap water for one minute. 2.       Once soaked, discard the water and insert one filter into the filter holder with the flat edge facing downward. 3.       Then fit the filter holder back into the water tank with the wide part downwards. Important Bits: Designed exclusively for Nuby’s RapidHot™ machine. Always use Nuby anti-bacterial carbon filters with your RapidHot machine to ensure a safe feed. Other brands of filters may not safely filter water even if they fit. Our carbon filters are food-grade certified so you know they’re safe enough for your baby. For more information please see the RapidHot Filters user manual. *RapidHot filters last up to 4 weeks depending on number of uses.