(57) A cup for the preparation of beverages which comprises a body portion having a diaphragm hermetically sealed therein to extend normal to the axis of the cup, the lower surface of the said diaphragm forming the upper part of a beverage infusion device, the lower part of the beverage infusion device being permeable to liquids and being deep drawn or formed to provide a receptacle for a beverage ingredient or ingredients, preferably leaf tea or ground coffee, the said upper and lower parts of the beverage infusion device being joined together around the edges thereof.