Some people will drink coffee out of any old ceramic receptacle. But me? I want a mug that reminds me of the power of the Dark Side every time I drink.

The $12 mug from ThinkGeek changes color when you pour a hot liquid into it. In the cupboard, it’s just your regular run-of-the-mill Vader mug; when you’re drinking, the lightsaber lights up, along with a reminder that ‘You Don’t Know The Power Of The Dark Side”.

If space battles are more your thing, the Battle Scene mug trades Vader for a bunch of fighters; light-up messages are delivered in the form of lasers.

[ThinkGeek via SlashGear]