sometimes you need a bag
and there isn't one handy in your pocket.
catch a passing piece of paper
fold the top down a bit
turn it over
fold [at right angle to original fold]
then fold in the other side
tuck one flap under the top collar of the other
turn it over again
fold it more or less in half
tuck the folded up bit into the collar
open out the bag
what you put in it is up to you
you're on your own now.
i'm busy with my walnuts.