The Canadian penny or 1 Cent coin hasn't really disappeared yet, but the Canadian Mint stopped distributing the currency today. They cost more to produce than thier face value, which is so small now that many wind up in jars and drawers.
quote: The Canadian penny is pre-deceased by the Australian (1911-1964), New Zealand (1940-1989) and Irish (1928-2000) pennies. It is survived by the American penny (1793- ) and the British penny, its royal and ancient ancestor, which dates back to the seventh century.
It is a beautiful coin I must say. We encounter them here sometimes, much moreso further North for obvious reasons. Our coin/vending machines reject them for whatever reason. I don't know that their size or copper or other mineral content is that different from a US penny that a machine wouldn't take them, but, they don't.