@quixoticgeek I currently use the tubs that a particular brand of yoghurt is sold in for my collection of useful small bits and pieces that come off bicycles like cleat bolts and things that have been used but could be used again (but which are being replaced because new ones came with whatever I'm fitting). I eat the yoghurt anyway, and they have lids, and they fit in my toolbox.
@quixoticgeek As it happens, I was hunting for a particular bolt this week, and they are still in the kitchen.