The Ashes urn was originally presented to Ivo Bligh, the captain of the English cricket team, during their 1882-83 tour in Australia. It was given as a personal gift after a friendly match at Rupertswood mansion in Sunbury. The urn is believed to contain the ashes of a cricket bail or the burnt remains of a lady's veil. It was humorously described as "the ashes of Australian cricket," following England's victory over Australia, which was seen as regaining the "ashes" that were metaphorically "lost" when Australia defeated England at the Oval in 1882, prompting a British newspaper to publish an obituary for English cricket source.
Here are some images of the Ashes urn: