Cheaper than ink
you certainly are well prepared for future contingencies. Some nice lookers in the group as well.
being somewhat literal minded, and since i have this notebook cover with space for four pens, i put four pens in it to take to work. Sheaffer school pen, pilot fp 78g, pilot petit 1, and a parker jotter ballpoint. Oh, and the fisher space pen that always goes in a pants pocket.
All inexpensive but reliable.