I've never heard of National Coffee Day until this year and it caused me to research how drivers consume that sweet nectar while on the road. Americans pay an average of $2.70 for a cup of coffee according to a report in U.S. News from two years ago so you know it's more now. I think that's a little high for truck stop prices but I'll use that number. Now imagine a trucker who is on the road 200 days a year. That's $540 a year in coffee!
The most economical way to consume coffee on the road is to make your own. I have a simple $25 "Mr. Coffee" coffee maker that I plug in to my inverter and make a cup each day. I always have the engine running when I make coffee because it uses quite a bit of power. Making coffee this way costs about .06 a cup. Coffee by the cup or the Kuerig style makers are very expensive. Someone actually calculated that the coffee costs between $40 and $50 a pound when purchased this way. It costs around .70 a cup when you make your own with the Kuerig style. That's still cheaper than buying it at the truckstop, but much more expensive than my Mr. Coffee maker.
If you are a coffee drinker and are looking for a way to save a little money on the road, I recommend buying your own inexpensive maker and making your own. It's nice being able to make a cup of coffee any time of day and not having to depend on getting to a truck stop.