We have an old Thermos that we use when we take a road trip. Having coffee in the car saves us a lot of money, as my husband drinks a lot of it. If we didn't have the thermos, he would buy coffee at each pit stop. Each pit stop then multiplies in cost depending on how many people are in the vehicle.....if he gets something, they all think they need something.
We bring a cooler along too for that reason!