Odor in Plastic Container (Small)

This sounds dumb, and yes I COULD buy another one IF I could find one, but.... :blush: I use a small screw top container to hold vitamins during trips. This is divided & very compact for storage in Class C.
Unfortunately, :( I left it with vitamins inside(Vitamin B complex to be specific) which leaves an objectionable odor that not only permeates the pill box, but surrounding area (i.e. the bathroom or any compartment its stored in). :dead: Have tried soap/water, baking soda soak, sunshine, & open filled with baking soda sitting in sun for days. No luck. Any ideas? Thanx :)