Ami . wrote:

I think the dollar coin should copy the British One Pound coin. It's a
small, thick little fella, and cannot be mistaken for anything else.

That would mean every soda vending machine, candy and ice cream machine,
coin laundry, coin car wash, coin telephone, bubble gum machine etc. in
the U.S. would have to be modified.

The obvious solution is to adapt every coin-op machine to take only
pennies. That way changes would rarely have to be made to the mechanism
and there would never be a need to dispense change. People would warm
to the cent again, return the contents of their piggy banks to
circulation, and enjoy that $1.50 Diet Coke more because of the work
they had to go through to get it.

Bruce