I'm not saying you shouldn't rock an Attack on Titan mobile phone case in the shape of the 3D Manoeuvring Device's controller from the show. By all means, let your otaku flag fly. All I'm saying is don't pull this thing out on the train if you don't want get arrested and/or shot. Because it looks exactly like an IED detonator.
The case itself is very cool. It's a faithful adaptation of the device from last season's monster anime hit (and massively popular manga) Attack on Titan and is available from Strapya World for roughly $US38 for iPhone 5c and 5s models. The outer trigger opens a shutter to enable your phone's camera -- and makes you look like a mad bomber should you pull your phone out in public.