BOSS Coffee (Cafe au Lait) Suntory BOSS Coffee started its history in 1992 in Japan. First was product launched in 1992 and it have developed into numerous flavours. Cafe Au Lait has more milk contained than other Boss variations. Shake it first then open and enjoy the rich taste of BOSS coffee. Drink it hot or cold! To heat, put entire can in pot of hot water (not boiling) for about 3 minutes.