Because if they called it Nut Juice nobody would buy it.
In a math book I can buy 57 papayas at $1.99 each and no one will care.
The hippie carrying it. What's dumber than that? The yuppie buying it. What's dumber than that? The box of rocks
Because nobody would drink it if it was called nut juice.
Nut juice" wasnt very popular.