Candle to milk (or Salt)
	A candle on display is lit, for some part of another routine, or you can light it for this specific effect. It is covered with a small cap to extinguish the flame. When the cap is removed, the candle tip has vanished, and the candle has transformed into a clear cylinder of milk, which you can pour out. Or if you prefer, the cylinder could be full of fine salt or sugar which could be poured from the cylinder.