Greg Harper, president of Harpervision and co-founder of Gadgetoff, is–let’s be honest–a gadget freak of the freakiest level.

Check out this demo at the seventh D: All Things Digital, where Harper pulls out one odd but innovative product after another from his cornucopia of gadgetry.

They include a bad-breath checker, a knockoff Chinese version of the Apple (AAPL) iPhone, a tricked-out diving mask, a water-purifying straw and much, much more.

Here is the video of the full D7 demo: