I considered the Stanley and HF options and opted for the Stanleys. The HF lid is polyethylene, a little milky, and a little bendy while the Stanley lids are polycarbonate, clear and somewhat stiffer. Neither option will do a good job of preventing small parts from migrating between compartments so I never 'briefcase' carry.

I built a few units similar to this (https://i.pinimg.com/originals/43/f8/d6/43f8d64f96ae537698a4...) to hold all of them.