PIERCEABLE CAP

摘要

A pierceable cap 11 may be used for containing sample specimens. The pierceable cap 11 may prevent escape of sample specimens before transfer with a transfer device 43. The pierceable cap 11 may fit over a vessel 21. An access port in the shell of the pierceable cap 11 may allow passage of a transfer device 43 through the pierceable cap 11. At least one frangible layer 215, 216 may be configured with cross slits 506 in a particular cross slit geometry. The cross slits 506 may contain an openable portion 644 or be covered by a thin membrane 645. The shell 610 and frangible layer (s) 215, 216 may be integrated into a one piece cap 601, or be separate components 634. The membrane on which the cross slits 506 are placed can be flat or contoured to guide the transfer device 43 to the cross slits 506.