I had a professor in college tell me a story about a backpacking trip she took in Arizona. To save weight and lessen her water demands in the dry environment, she decided to leave her coffee making setup at home and just bring a bag of coarsely ground coffee beans...
...Beans that she intended to just chew on, straight, just like chewing tobacco, to get her caffeine fix.
After waking up the first morning in camp and loading her mouth with coffee grounds, she said she took a moment to consider what she was doing. A bit of coffee spittle oozed out of her mouth and she became appalled with herself, spit it all out, and immediately dumped her baggie of coffee grounds.
Needless to say, the lecture she was giving that day in class was on addiction.
...Of course, the lecture took place many years after the story, and she was giving it while drinking a strong cup of coffee...
I am not a coffee drinker myself so I can't really answer the OP's question. My wife has taken starbucks via on trips before and has liked it.
Of course, as a non-coffee drinker, I would suggest simply going without, as a few others have, but that's not going to be a popular solution to any coffee drinkers (i.e. the people who actually care about the answers on this thread).