Coca-Cola is among the marketers to try out the StickyBits application, which allows users to use smartphones to access video, photos, text or audio from soda cans and other products with special bar codes. The content also contains geo-tags and is linked to a user's social network. "Imagine you're a beverage company, and you have content that people can only see when people check into your can," StickyBits co-founder Seth Goldstein said.

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