Not to put a slant on the subject, but I remember seeing a "tool belt" at a snowboard store about 15 years ago. It had a few screwdrivers and hex wrenches. "Tool" was also snowboarder slang for "loser", and I doubt any experienced snowboarders bought the belt. I think it was a gag gift.
I've seen belt buckle brass knucks, knives, and revolvers, but never storage spaces. The neatest one I've seen lately is one that can be used for emergency rappelling, but I don't remember the brand name.
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"Let us climb a mountain, hanging on by low scragged limbs." - Roger Zelanzany