Strings in the code suggest Google is working on a "generated email address" tool under the "Shield Email" moniker. Other strings give us an idea of how this might work as one claims users can ...

The Full Size shield and Megashield weigh 8.6 and 36 lbs. respectively, and roll up into a carrying sling. According to the company, the shields take between 10 and 15 minutes to set up.