Who does not know it - the high, unpleasant whistling sound that the boiling kettles on the stove make.
Richard Sapper designed for 'Alessi' the first stainless steel kettle with melodic pipe. The element consisting of two brass reeds reproduces a pleasant tone, which, as usual, signals that the tea water is ready for infusion.
A special kitchen instrument with cult status, which can also be left on the stove just like that.