Stay always in heaven with the Mighty Mug!
BPA-free, dishwasher-safe, microwave-save, it has a very very firm grip on the surface it is placed on. So when you push it, it just leans over but doesn't topple. To activate it, you just flex and flick it with your fingers as you set the cup down, and voila, no more spillages!
You can get it from Thinkgeek at $14.99 USD, more info here.
