"...From the inception, part of the value of the snack was the entertainment provided on its packaging..... Text might describe how to wash or mate Zonkers. The bottom of the box might explain how to determine if it were indeed the bottom: "Open the top, and turn the box upside down. If the Zonkers fall out, this is the bottom. If they fall up, this is the top. If nothing happens, this box is empty." Other text might suggest that 8 oz. (226 g) = 1⁄4,409 of a metric ton...."
https://en.wikipedia.org/wiki/Screaming_Yellow_Zonkers
Hours of hilarity.