According to an AP article,

According to an AP article, Warner Bros. has tapped Coca-Cola as their only marketing partner for the Harry Potter movie. Luckily, it will only include images of Harry on product packaging and will not include product placement in the movie. Rames from the Harry Potter Galleries has reminded me “It’s $150million, the largest promotional deal ever and almost 3/4 of the production cost for the movie. Big deal for AOL Time Warner.”