At first glance a Self Stirring Mug seems a bit silly. But after thinking about it for a few more seconds it makes sense. Assuming the the self stirring mug is easy to clean I may just spring for this $18 gadget.
When you make a drink, say coffee for example. Typically you add coffee, sugar, and cream and stir it up with a spoon. Then a few minutes later things have settled and the sugar is at the bottom of the cup. You no longer need to keep a spoon handy, just push the button for a quick and easy stir session. The only thing that seems silly now is the HUGE letters on the side of the cup that say "SELF STIRRING MUG".