I'm rather partial to a rectangular Milk Crate with a cardboard "orange crate"
(an 11x11x17" "slip top" cardboard box) as a liner to keep small stuff from falling out.
Typically for tools and such I insert the inner part of the box "backwards"
into the box top so as to create "double layer" box, but for my emergency
spares kit (alternator, starter, coil pack, EDIS module, Crank pickup,
spark wires, PCM, and spare Belts (both A/C and Non-A/C)) the box is
assembled normally and put inside a milk crate to make it easier to pick
the heavy bitch up.
You can pack an amazing ammount of stuff into a milk crate.
AD