Nutritional delivery system using single-serve capsules comprising: - a dispenser for a nutritional composition comprising means for providing water into a single-use capsule containing a portion-controlled serving of a nutritional formula, - different types of capsules being designed according to a nutritional feeding plan corresponding to persons or categories of persons to be fed, each type comprising capsules containing a nutritional formula; the capsules of different types having at least one differentiating characteristic so that each type of capsules corresponds to a feeding time period determined by the feeding plan, - control operation means associated to each type of capsules, said means comprising information relating to at least one differentiating operational parameter relevant to produce and deliver a differentiated nutritional liquid in the dispenser according to the nutritional feeding plan, wherein the at least one differentiating characteristic of each type of capsules and the at least one differentiating operational parameter differ according to the age of the person to be fed and, wherein the amount of nutritional formula contained in the capsule differs for each type of capsules and, wherein the nutritional formula differs for each type of capsules according to at least: - the proteins source and/or proteins content, - the carbohydrates source and/or carbohydrate content and - the lipids source and/or lipids content, wherein the size of capsule further differs for at least two different types of capsules and the control operation means increase the volume of water for reconstituting the nutritional liquid as a function of the size of the capsule. - a dispenser for a nutritional composition comprising means for providing water into a single-use capsule containing a portion-controlled serving of a nutritional formula, - different types of capsules being designed according to a nutritional feeding plan corresponding to persons or categories of persons to be fed, each type comprising capsules containing a nutritional formula; the capsules of different types having at least one differentiating characteristic so that each type of capsules corresponds to a feeding time period determined by the feeding plan, - control operation means associated to each type of capsules, said means comprising information relating to at least one differentiating operational parameter relevant to produce and deliver a differentiated nutritional liquid in the dispenser according to the nutritional feeding plan, wherein the at least one differentiating characteristic of each type of capsules and the at least one differentiating operational parameter differ according to the age of the person to be fed and, wherein the amount of nutritional formula contained in the capsule differs for each type of capsules and, wherein the nutritional formula differs for each type of capsules according to at least: - the proteins source and/or proteins content, - the carbohydrates source and/or carbohydrate content and - the lipids source and/or lipids content, - the proteins source and/or proteins content, - the carbohydrates source and/or carbohydrate content and - the lipids source and/or lipids content,