in a tupperware box i have
chainbreaker,
multi tool,
swiss army knife,
puncture repair extra patches and extra tube glue.
spare chain links
various siz small spanners for racks nuts mostly.
spoke key .
spare reading glasses.
zip ties,
good quality tire leavers (steel with plastic cover)
oh yeah the smallest allan key for the jocky wheels
thats about it i think all fits neatly into a tupperwre box 4x2x2
hope this is of some help it rescued many a cyclists who just carry the bare minimum.