Celebrate the 40th anniversary of Star Wars with this officially licensed Expressions of Darth Vader Star Wars Coffee Mug at Walmart.com. Originally $14.98, it drops to $7.85 and ships for free at the time of posting. This is the best price we could find online after shipping. It's made of ceramic and holds 11 fl. oz. Please note that it is not dishwasher safe. Sales tax is charged in most states.