He then produced about a dozen fist-sized rocks and carefully placed them, one at a time, into the jar. When the jar was filled to the top and no more rocks would fit inside, he asked, "Is the jar full?"
Klots, recommended a more complicated method of transfer that involved holding the handle between one's thighs, grasping the bag just below the butterfly, slipping thejarintothe net, and coaxing the butterfly intothejar.
This is partly offset, however, by the need to circulate 50% more coins than we currently do dollar bills, because of our habit of dropping coins into our coin jar at the end of the day.