Ampoules of Sterilised Distilled Water Four ampoules of sterilised distilled water in brown and yellow carboard box. Label on ampoules reads: "STERILISED/DOUBLY DISTILLED WATER/10 c.c./THE BRITISH DRUG HOUSES LTD./LONDON". Label on inside of box lid reads: "Heat the sterilised water by immersing the/ampoule in boiling water, allow it to run/into the ampoule containing the Congo Red,/dissolve and cool before use." [1925-1975]