The logistics of drinking coffee are pretty straightforward: find a flat surface and set your cup down. But for those long lazy sessions on the sofa, you might want to get the Lap Mug. It’s wedge shaped, which allows you to easily set it down between your legs. However the wedge angle isn’t so pronounced that you can’t set it down (tilted) on a table. Just don’t do that while the cup is too full.
It’s £10, or roughly $17.