CocoboloCowboy got it right......I carry six different grit sandpaper (600,1000,1200, 1500, 2000 & Croakus Cloth) plus a leather burnisher and a couple of tip shapers I've collected.
With all the banter about what's the best shape tip to play with, the best tip shaper to use, etc., I submit that sandpaper still works better than any tip shaper invented to date. You are able to shape the tip in the ideal shape you want it to resemble (dime, nickel, penny, quarter ......doesn't matter). Additionally, you are able to scuff the tip lightly or with as much pressure as you want and you can scuff the tip perfectly to eliminate any even slight glazing without having to scuff the entire tip.
I think tip shapers are mainly for players that are most likely lazy and the tip shaper is easier or maybe they don't know how to shape a tip without using a tip shaper. I just find it ironic when I see players scuffing a tip that badly needs replacement , probably from being scuffed , sanded or shaped way too much. There's barely any tip height remaining but the player keeps shaping what's left. It's actually humorous to watch them when they start complaining about missing shots...........DUH?
SANDPAPER........................old school approach admittedly but nonetheless IMO still the best for shaping a tip.