“The cap clips onto your inside pocket well, but only if you’re wearing very thin material. Fortunately this suits me fine, as my job involves standing in a square pretending to be a silver statue, so I wear nothing but tin foil. (3 stars out of 5)
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One of many cheeky user reviews on Amazon.co.uk of the Bic medium black ballpoint ben, to be had for £0.13. Here is another great one penned by H. Maxwell Harbinger VI, Esq.
via Crazed Teacups