a novel sample cup including an integral venting cap for use in xrf spectroscopy application_number US 201514871266 A description shown in fig1 is an outer member 1 with a top open end shown and a bottom open end not shown the outer member is dimensioned to frictionally fit circumferentially about inner member 2 shown in fig2 outer member is distinguished by a flanged upper rim 3 first projections 4 about the flanged upper rim a lower body and second projections 5 about said lower body shown in fig2 is inner member 2 with a top closed end not shown and bottom open end inner member 2 is shown with a hinged cap 6 in the closed position a center portion 9 is designed to be depressed to vent said inner top closed end shown in fig3 is the outer member 1 assembled in position over inner member 2 shown in fig4 is outer member 1 partially assembled on inner member 2 in practice a thin film would be placed between outer member 1 and inner member 2 the thin film dimensioned to cover the bottom open end of inner member 2 such that upon assembly a liquid sample would be retained for spectroscopic analysis the first projections 4 may be dimensioned such that when the sample cup is assembled on a hard surface such as a tabletop the first projections will contact the tabletop when outer member is fully assembled over inner member in at least one embodiment this may result in approximately 0 005 u2033 clearance between the thin film covering the.