U.S. food company Kraft Heinz offered $143 billion for the British-Dutch consumer goods conglomerate Unilever. Unilever rejected the proposal, but Kraft Heinz said it looks forward to reaching an agreement on the terms of a transaction. If the deal does eventually go ahead, it would be one of the largest acquisitions on record. It’s just a year since Heinz and Kraft Foods merged, but these big-time mergers are nothing new for the industry.