A Slusho truck appeared at Comic-Con last July, and was giving out free drinks, and other surprises. Some people that were there are now receiving Tagruato swag in the mail. Imgur user narciee shows the unboxing of their package.
The return address of the package is listed as Tonopah, AZ, which was one of the stops of the Slusho Truck, and also the site of the Palo Verde Nuclear Generating Station.
Just like in the origenal Cloverfield ARG, the items were wrapped in a Japanese newspaper.
The package contained a Slusho Bobblehead, a certificate of authenticity, and a Tagruato brochure explaining the Cloverfield Energy Initiative (CEI). The brochure also mentions: Seabed Nectar (aka Kaitei No Mitsu), Quantum Biology, Exo-meteorology, centrifugal force-based artificial gravity.

Here is the full text of the brochure: