Primary packages configured for display and sale without secondary packaging are stacked horizontally in a product display tray. The consumer-facing surface of the back panel of the product display tray may contain graphics including product information provided on the primary package's principal display panel (which is typically faced towards consumers). Thus, consumers may readily view the product information provided on the principal display panel as primary packages are removed from the product display tray and principal display panels of remaining primary packages are hidden from view by one or more walls of the product display tray. The individual primary packages may be contoured specifically to inhibit lateral relative shifting while in a horizontally stacked configuration. The individual primary packages may shaped to facilitate grasping by having a first surface contoured for grasping in the user's palm, a second surface opposite the first surface with molded branding information for engagement by a portion of the user's fingers. Molded branding information may be positioned on a surface of the primary package that faces upwardly when the primary packages are positioned in the product display tray.