When you need to drink your coffee as silent and deadly as possible — the Ninja Mug is here to help. Complete with an insulating ninja mask, deadly spoon sword, and shuriken star coaster — the mug might be a little hard to find in your cupboard, but will spring into action when summoned.

And, what to have with your deadly ninja coffee or tea?… Ninjabread Men of course.

[link, via Laughing Squid]