The Michigan counties of Wayne, Bay, Ottawa and Delta are among those that now use interactive urinal communicators in bars and restaurants. In preparation for drunken driving enforcement during the Fourth of July, the talking (and sometimes flashing and singing) urinal cakes were distributed to about 200 businesses by the Michigan State Police.

"We want people to be safe and make responsible decisions," said Anne Readett, spokesperson for the Office of Highway Safety Planning, a division of the Michigan State Police, reported The Detroit News.

The urinal cakes are not activated by alcohol content or moisture, but motion. Each device is designed to last three months and costs about $21, which was paid for by federal traffic safety funds.