Your link to the Sambucol page recommends 4 tablespoons daily for flu treatment. That equals one-half bottle (4oz./120ml bottle) each day per adult. Say you have 2 adults and 2 grown children, all being treated for symptoms. That equals 2 bottles per day. Readers may want to get right on this. Drugstore.com gives free shipping on $50+ orders. They are currently out of stock but promise delivery of Sambucol with two week order fulfillment.