The sampler came in a digipack which can be unfolded to reveal which games are featured on the disc. No other inserts were included with the first few volumes. It contains a PlayStation Awards video featuring Bio Hazard.
The PurePure series was distributed to members of the PlayStation Club. Pu-re Pu-re is a play on words, and can be taken to be short for Preview Play.
Thanks to Dot50Cal (image 3).