Fig.: a business requiring little investment and maintenance, but producing constant profits over a long period; a moneymaker

Paper tissues are what we may call a cash cow product. I think nobody will ever give them up

I fazzoletti di carta sono un prodotto che potremmo chiamare “una macchina da soldi”. Credo che nessuno vi rinuncerà mai

Our production of extra-large size outfits turned out to be our cash cow

La nostra produzione di abbigliamento extra-large si è rivelata la nostra miniera d'oro

This term was coined by management guru Peter F Drucker in the mid-1960s to describe “a business or product line with a large market share in a stagnant or declining market”, which can yield constant flows of profits for some years without further investment and little maintenance