My shop area has a built in cloaking device that activates whenever I drop or misplace a part. There's all kinds of parts missing in that little room that just have to show up someday.........or so I tell myself. They continue to elude me. For simple transport of parts, put em in tupperware. (the cooking kind, not the black shooting kind)
I've gotten to where when a part takes off for parts unknown I call Brownell's and order three replacements, one to lose, one to break and one to put in correctly.