Here are three different approaches to brewing up on tour (all of these obviously require a fuel canister for the stove):
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Clockwise from top left: BRS-100 stove, boy scout mug, snow peak cookpot and lid, plastic spork, gold one cup coffee maker. I've had that coffee maker since the late 1980's and it makes excellent coffee. The downside is that it is a little bit bulky and requires extra effort to clean.
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Clockwise from top left: Coglan's one cup coffee filter, mug from Stanley cookset, snow peak cookpot and lid, plastic spork, snow peak stove, and one of the filters and the little plastic handle for the filters (don't lose it!). This is lighter and less bulky than the gold filter, but the coffee it makes is considerably less impressive.
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Clockwise from top left: Starbuck's Via Instant coffee packet, Yeti insulated mug, snow peak cookpot and lid, plastic spork, snow peak stove, and full package of Starbuck's instant coffee. The coffee is oily and heavy and burnt-tasting, but this is the fastest and lightest and easiest cleanup of any caffeine delivery system described here. Also, the Yeti mug is both obnoxiously expensive and insanely heavy.
You can make even better coffee if you just make cowboy coffee using a
coffee grinder, but the cleanup is a bear and getting the grounds out of the coffee when you pour is a challenge for the inexperienced.