Well, our caffeine problem has been solved. Recently while picking up a few things at our local Publix grocery store we spotted a treasure: tiny thermoses made just for carrying espresso.
Al makes our espresso in a traditional stovetop espresso maker. He likes his espresso black with sugar. I like mine lightly sweetened and laced with steamy almond milk. Which means we own two little espresso thermoses for our bike rides so that we each can have exactly the mix we crave. Each thermos holds the perfect amount for a mid-ride break. The little thermos cap serves as your cup. (As you can see from the photo, it's the size of a typical espresso cup.)
Espresso. It can really do wonders for your attitude.