A method of preparing a single serving of a nutritional composition comprisingintroducing water into a disposable capsule (30) containing a unit dose of thecomposition in concentrated form so as to reconstitute the concentrated compositionand operate opening means contained within the capsule to permit draining ofthe resulting liquid directly from the capsule (30) into a receiving vessel.The method allows individual servings of nutritional compositions such as infantformulas to be prepared with substantially reduced or even eliminated risk ofcross contamination from previously prepared servings.