Abstract: A plastic case suitable for housing a DVD disk manufactured by assembling a sandwich of heat-sealable members and heat-sealing them together to permanently seal the parts together. The manufacture utilizes vacuum forming of a rigid plastic sheets rather than injection molding to form the critical part of the case that functions to hold the disk on a center hub and that allows release of the disk by pushing down on the center hub. The center hub comprises three projections surrounding and each connected by a valley region to a center button-shaped member. Each projection at its outer edge comprises a detent region projecting above a recessed region beneath which functions to hold the disk in its mounted position above the level of the surrounding sheet surface. The recessed regions terminate below the disk in common, annular surface regions.

Abstract: A guitar pick having a body terminating at an edge, with a tip defined along a portion of the edge, includes first and second faces with first and second wear indicators disposed thereon adjacent the edge and spaced inwardly therefrom. The wear indicators provide a fixed reference against which the wear experienced by the tip can be ascertained. The wear indicators can be either lines imprinted on the first and second faces or can be raised ridges extending outwardly therefrom.