Image Yumi-Yumi
This is not a new idea, in fact we've previously featured something similar (and less intimidating in our opinion) here, but nevertheless, it is still effective.  These cups are from Yumi-Yumi, a Brooklyn based group of designers and feature creepy crawlies and other beasties which are all poised to snap at you with their jaws and claws or wrap you in their tentacles.

Images: Yumi-Yumi