"...no anime shall escape my sight
Let those who question manga's might,
Beware my power... Nekomimi's light!"
Screw fear, hate, greed, or will: the Nekomimi Ring is fuelled by the burning emotion of Moë!
...and it doubles as a bottle opener.
DC offers cheap plastic as a give-away -- the nekomimi ring is stainless steel and it'll set you back a Hamilton, but isn't your dedication to cat-ears (and beer) worth 10 bucks? available for $7.99 (plus shipping) from Think Geek.