People are forever saying to me ‘But I don’t like tap water’. Well maybe the facts below will help you to change your mind. Ice Everybody likes ice in their drinks but are you aware that the ice making machines in pubs, cafes and restaurants are plumbed into the mains? Yes, tap water. Frappes Those fancy iced fruit frappes from your local coffee house chain, that you pay around £3.00 each for, are made from 90% tap water.