Solve your girl problems with DIY Smart Coasters

There is no way that little honey from down the hall is going to interrupt your conversation about the LHC when she spies these bad boys. All they do is display whether a drink is hot or cold with an appropriate LED, and when you tell her that you made ‘em yourself, her along with all of her little friends will be gone too. That way you can bust out your best “Are You Gonna Be My Girl” on Rock Band when her judgmental eyes aren’t burning into you.

Hungry Scientist via dvice