The Milk Frother cover is made of plastic Material,It is effortless to install and remove,Simply place it on top of your for Aeroccino 4 milk frother and twist it into place. If your milk frother lid Cover is cracked, for the sake of your milk frother safety and use experience, Simply replace the lid of one milk frother.milk frother lids are easy to clean, they can be rinsed directly with water or put in the dishwasher after use.
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