If you move quick you can snag a free Star Wars branded Google Cardboard just in time for the release of the new film. Head over to this page, pick out your design from BB-8, First Order Stormtrooper, Kylo Ren, and R2-D2, and put in your shipping information.
Update: Annnnnnnnnnd they’re gone! People are still reporting that is you keep refreshing the page you may get luck to snag one.