I just finished two back-to-back weekend trips (both 3 day/2night) in places under a burn ban, and could not use any stove or make a fire whatsoever. I brought VIA and used cold water. I thought it was wonderful and it hit the spot. Yeah, it might have been nice if hot, but it's good quality and tastes good enough black and cold that I'd never carry a stove/fuel just for that. I use it almost double strength (2 packets in a 12oz cup), and if too strong, I add more water as I sip. It's so easy to make when you first wake up and you aren't quite coherent yet – I found I didn't miss the hot part.
The first time I used a jcx paper cup with top (Java City disposable cup from work) – 16g. Held up ok – would get a little squished in the pack, but not bad, popped back into shape and held the lid ok. Second trip I brought a "tall" Starbucks paper cup (also 16g). Significantly more fragile, hard to keep the lid on, and I doubt it would have made it another day – won't use that again. I should add that both times I used the little green stir stick thing that they give you with your coffee in the Starbucks drivethrough to stir and to keep the hole in the lid shut when I set the cup down or hiked while holding it. As I knocked the cup over once or twice (when still sleepy), I found that this works pretty well.
As we were trapped in the park on the last day of the second trip (the Colorado River had flooded the only road out), I didn't get out until *very* late and stopped at a gas station on the way home for coffee so I'd be awake and safe on the road. BY FAR this was the sturdiest of the "disposable" coffee cups, and the lid has a little tab that closes the opening. I saved it and I'm using this one next time.