A pregnant woman was served a cleaning agent in a cup rather than the latte she ordered from a McDonald's in southern Alberta. Sarah Douglas was taking her son to a baseball tournament on Sunday morning when she went through a drive-thru at the McDonald's restaurant on University Drive W. in Lethbridge and ordered a latte. As she drove onto Highway 3, she took a sip. "I immediately had to put my hazard lights on and pull over and spit it out and rinse my mouth out with ... water," said Douglas, who is more than seven months pregnant with...