Yup spot on.
It first came around in the west end of glasgow... small van called scoobie parked outside the glasgow uni student union thus...... the scoobie snack.... BM you forgot cheese, blackpudding, onions and haggis
Ah, I knew it, but that falls under the bit "...and a bunch of other stuff", hehe.
Was first made aware of it by an online gamer who works in Glasgow, seen a picture of one too....