Popsugar Culture Tech Accessories Pi Products Happy Pi Day! Celebrate With These Quirky Finds March 14, 2014 by Laura Marie Meyers View On One Page Photo 5 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Pi Cologne by Givenchy For Men Spritz on a holiday-appropriate scent with Pi Cologne by Givenchy ($50) — an infinitely cool cologne with sleek, sophisticated packaging. Pi Cologne by Givenchy $50 from amazon.com Buy Now Previous Next Start Slideshow