Pepsi-Cola North America is joining forces with online retailer Amazon.com in a major promotion which allows consumers buying special packs of Pepsi brands to download music from Amazon MP3 for free.

The Pepsi Stuff promotion will see some 4bn special marked Pepsi packages distributed which allow consumers to collect points and redeem them for music from Amazon MP3.

From 1 February, consumers purchasing Pepsi brands can "bank" their points on PepsiStuff.com and redeem them for music on Amazon MP3, Pepsi-Cola North America explained. The promotion extends over the entire Pepsi brand range.

"Pepsi Stuff gives consumers choices - many choices: from the prizes they select, to the music they want to hear, to the device they want to play it on," said Cie Nicholson, senior vice president and chief marketing officer at Pepsi-Cola North America. "We're also broadening the prize pool to include Amazon Unbox TV downloads, electronics, apparel, DVDs and CDs. We're offering up to US$1bn in prizes, making this the largest promotion we've ever done."

Bill Carr, Amazon.com's vice president for digital music and movies, said: "We are excited to team up with Pepsi and reward millions of Pepsi Stuff participants with high-quality DRM-free music downloads from major and independent labels, playable on virtually any device, and an easy downloading experience that doesn't require special software."

Participants in the promotion can enter daily sweepstakes for the chance to win trips to events like the Super Bowl, the MLB All-Star game and the Daytona 500, as well as cash and other prizes.