Let's be frank. Sometimes, when you're sitting on the couch, and you're feeling pretty comfy, and you've got a pleasantly warm beverage in your hand, it is just a little too much to ask to unsettle yourself to reach over to steady your mug on the side table or reach down to lay it on the floor. Sometimes, you just want to rest the darn thing on your knee and never let go. This, friends, is the drinking vessel for you: The bottom is specially curved to sit just-so on your leg. Check out the lap mug as well, but make sure your tea of coffee is less than scalding to protect your delicate bits.