The OPMOD Battle Mug is a tactical coffee mug with mounting points for night vision scopes, lasers, and other rifle accessories (video). It is produced by OPMOD, a manufacturer of outdoor and tactical gear. Thanks to Graeme Wagoner-Lynch for the tip.
![OPMOD Battle Mug](https://cdn-ak-scissors.b.st-hatena.com/image/square/a107a09d5db919d9e702d6543d6c66114415fa9e/height=288;version=1;width=512/https%3A%2F%2Flaughingsquid.com%2Fwp-content%2Fuploads%2Fopmod-battle-mug-02.jpg)