A method and device for manufacturing a viscous or semisolid product. The device includes a versatile product holding tray for manufacturing or forming the product. This tray is a polygonal member that includes a top surface for receiving the liquid or semisolid product, and a plurality of sides wherein at least one side includes a registration recess that is configured and dimensioned to receive at least a portion of a retaining bar of an endless conveyor to facilitate positioning of the tray upon the conveyor so that the retaining bar advances the tray during manufacture of the product. The device also includes an endless conveyor that includes a plurality of spaced tray retainer bars thereon for holding and advancing the tray to one or more product forming stations for forming the product on the trays.