I have my Australian collection in two 3 ring binders; a 1 inch for pennies and cents only, then a 3 inch for the displayed pieces. I keep the overflow in a wooden treasure chest, and in a milk bottle. o.0
Yes, I know wood can be bad for coins. It's a temporary thing until I can find something more satisfactory to do with all these coins. I may have to start selling/trading some of them.