The Bic pen, can’t go wrong with it’s simplicity, never fail use, it’s the work horse of all pens. Used daily. The fact the whole entire series of Seinfeld was written by yours truly the Bic ballpoint pen.
Carl also wrote in in praise of the Bic Cristal
Big fan of the original Cristal myself. It’s even in MoMA. The Wikipedia page is worth a read: https://en.wikipedia.org/wiki/Bic_Cristal