I found this, it looks to be very rare, check this out.
It's a rare Green Day cassette entitled "Six Oreos & A Coke". This was a promo release from 1997, just before the band's "Nimrod" album was released. It features Billie Joe being interviewed by a young, high school music writer (David Malitz, who has gone on to cover music for the Washington Post in Washington, D.C. for the last 8 years). If memory serves correct, these tapes were sent out to high school newspapers by Reprise Records, and may not have have gone out anywhere else, so this is a rare Green Day artifact indeed. The label says "A special high school only Green Day interview. Further Green Day edification & insight for your exclusive use!"
Here is the link for people that want to check it out
http://www.ebay.com/itm/Green-Day-Six-Oreos-A-Coke-rare-promo-interview-cassette-Nimrod-Dookie-/120973281316?pt=Music_Cassettes&hash=item1c2a91c824