Abstract: In the method for preparing metered amounts of a drink in situ such as coffee, from soluble powder, a concentrate of a drink is produced by dissolving determined quantities of soluble powder with water. Then part or all of the concentrate is diluted in hot or cold water in order to produce a metered amount of a drink. The device for the implementation of the method includes an enclosure using a defined large volume of soluble powder and a relatively small defined quantity of liquid such as water, for dissolving the powder in the liquid so as to produce a concentrate in situ, and device for diluting part or all of the concentrate in a liquid in order to rapidly produce individual metered amounts of a drink.