Early CAD on the coffee cup grenade. It will be a two part mug, the bottom is ceramic and the top is brushed aluminum, with a water tight rubber insert in-between for life on-the-go. The top will attach through a simple cam lock. I wanted to incorporate a grenade pin too. At first I thought it could secure the top piece, then thought of incorporating it into the spoon (handle). After reviewing these thoughts with my friend Ian McAllister he had the bright idea of a removable spoon that you can literally use as a spoon which is held in place by the pin. I think I'll add that functionality tomorrow.