Disinfection cap (300) includes housing (302) comprising closed top (322), essentially cylindrical sidewall (304), and open bottom (324) formed by the sidewall with opening (326) to inner cavity (328) within the housing for receiving tip (12) including mating feature (13) of needleless connector (9). Disinfection sponge (380) can be configured within inner cavity, removable cover (399) sealing opening to inner cavity to seal sponge within inner cavity prior to cap use. Inner cavity includes at least one thread (340) on inner surface (330) of its sidewall that does not correspond to the mating feature (13) of needleless connector, but is sufficient to interlock with mating feature of needleless connector. Plurality of disinfection caps are disposed on strip (2220) of IV pole hanging device (2260) such that each cap can be peeled off the strip unsealed for immediate use, or separated from the strip sealed for later use.
