A drinking straw comprising: - a tubular plastic wall having an elongate container section and opposite open ends； - a particulate product disposed within the container section, said particulate product containing at least one type of active ingredient for progressively adding the active ingredient to a liquid drawn through the straw； - liquid permeable retainers defining the container section and retaining the particulate product within the container section； wherein a majority of the particulate product comprises granule agglomerates each comprising at least two edible seed particle particles, surrounded by a coating containing the active ingredient, spaced from each other, and bonded by said coating. A method for manufacturing the particulate product is described as well.
