Trekker Space Pen by Fisher

Holy super pen. Without hesitation, this baby writes post-flight, upside-down, in temps down to -30 F and up to 250 F (think black dashboard in summer), and on wet paper (making it a great pairing with this water-resistant notepad). And, yes. It also writes in space. This travel-friendly trekker version is compact, yet packs three miles of ink. Comes with a carabiner to prevent disappearance into the depths of your pack or purse.