OK, not a ninja so much as a middle-aged mother of three with so much junk in her purse that my previous credit-card reader got ruined. Behold:
When I got a new Square, I trimmed the foam packaging to fit inside an old tin for mints.
Not just any box of mints, but my "Chicago" mints I got in a thank-you basket for leading the Young Clergy Women conference last summer:
Come to think of it, it's possible my purse is some kind of technology-munching menace. My Jawbone also got destroyed, even though I kept it in its own separate purse pocket. Now it's in an old coin purse.
Like I said... not a ninja.