5stardeal via eBay offers the Chef Buddy Auto Mixing Travel Mug with Tornado Action, model no. 80-01215A, for $9.99 with free shipping. That's the lowest price we could find by a buck, although we saw it for $2 less in July. This double-walled mug features push-button tornado stirring action and a spill-proof lid and requires two AAA batteries, not included.