A product dispenser reconfigurable in the field includes a housing, at least one tower unit, and a removable ambient box. The at least one tower unit includes at least one dispense point, whereby a product or diluent is delivered from a diluent or product source to the dispense point. The ambient box is an insulated product path that is adaptable to at least one external source and the tower units or the dispense points. The external source may be conditioned through external means or may deliver an ambient temperature product, wherein the product circuits passing through the ambient box may deliver product to any tower unit, thereby providing increased product variability within a same product dispenser. The product dispenser still further includes a tower structure that is removable without disabling the product circuits, and a method of merchandising on the tower structure.