At last a place where I can get away with mentioning my chagrin at the loss of triple-nutted peanut shells !
One might still find a shell with a single nut in a bag of "monkey nuts" rather than the standard 2-nut shell, but the triple-nut shell has long since disappeared.
My favorites were the 3-nut shells. (Once upon a time, there were even 4-nut shells, but, this far on I'm beginning to wonder whether I dreamed that).