And we don't know if this is licensed or not, and many would say not. Emerson Gear is releasing their "Tactical Mug" made out of 6061T6 Aluminum and in black colour. Just like the original Battle Mug, it has rails for which you can attach whatever you want to attach to it. The Battle Mug is patented and only sold in the USA, and most probably the Emerson Tactical Mug will not be available for the US market but elsewhere.

The designer of the Battle Mug, posting at the AR15 forums, said that he made this bottle opener after slaying some face eating zombies. So what's good is the Battle Mug if you do not have a bottle opener to open a beer bottle to pour contents into it? Obviously made as a companion for the Battle Mug, it's made for 4140 Pre-Hardened Mil-Spec quality steel.