It's such an old practice, but I guess it went out of style for a while there. Remember M&M's in E.T.?
Or all the Apple products in the Mission Impossible remakes? Or how "Trading Places" always goes to Home Depot for its stuff?
http://en.wikipedia.org/wiki/Product_placement
"Although recognizable brand names probably had appeared in movies prior to the 1920s, the weekly trade periodical Harrison's Reports published its first denunciation of that practice with respect to Red Crown gasoline appearing in the 1919 Fatty Arbuckle comedy The Garage."
TV programmes
List of TV shows with the most instances of product placement (11/07-11/08; Nielsen Media Research)
* "The Biggest Loser" 6,248
* "American Idol," 4,636
* "Extreme Makeover: Home Edition," 3,371
* "America's Toughest Jobs," 2,807
* "One Tree Hill," 2,575
* "Deal or No Deal," 2,292
* "America's Next Top Model," 2,241
* "Last Comic Standing," 1,993
* "Kitchen Nightmares" 1,853
* "Hell's Kitchen," 1,807