In all the gear lists, I haven't seen anyone mention a Thermos. My two-cuper keeps my coffee hot for hours, fits nicely in the side pocket of my pannier, and lets me stop for a cup in the park on the way to work or school. Plus I don't have to shell out $4.50 at the coffee chain or drink out of the week-old pot at work. One of my best investments, considering that I found it in closet.