This freebie comes from Equinox International. Get your Free Color Changing Solar Lights! The same company that had the pruning knife and the expanding garden hose. I received both of these items, but codes are limited. Not everyone will receive a code. Be quick to sign up!
UPDATE: Looks like they have changed the rules on us. It is no longer a code to get this item for free. Now they give you a link to sign up for their new club called Amazon Manufacturers Rebate Club. What this means is you will get a 100% rebate on items they send you that you may be interested in.