Other popular ideas included self - cleaning carpets and frying pans, lawns that keep themselves trim, self - watering plants,
pens that remember what they have written, wallpapers, textiles and
paints that change their colour or design when stimulated, anti-alcohol (a drink that makes you sober), «microfreezers» for rapidly cooling white wine and champagne, a multitude of devices that recognise and destroy unsolicited mail, and wind generators that can be flown like kites
instead of being sited on attractive Welsh mountains.