Abstract: A measuring-and-dispensing apparatus adapted to be removably secured to a jaw having powdered or granulated material disposed therein, whereby the material can be dispensed in a predetermined, measured quantity, the materials generally being, for example, instant coffee, tea, sugar, etc., the cap comprising a housing having a rotor arranged therein, including an adjustable measuring compartment to receive the materials therein, the rotor being rotatably mounted in the cap housing and said rotor having a selector device and an operating handle attached thereto, whereby the compartment can be moved from a filling position to a dispensing position.