What's the best way to flick someone off without actually having to flick someone off?
Someone vulgarly hitting on you from across your table. Aim the mug at him and start drinking - he'll get the message.
The most "passive" aggressive mug.
A perfect way to innocently tell people how you feel.
The image "have a nice day" and the finger on the bottom are printed on the mug itself - NOT a sticker like some imitations.