Pepsi has launched a contest in which the idea for the perfect engagement proposal will win a one-of-a-kind engagement ring: A 1.53-carat lab-grown diamond infused with Crystal Pepsi on a platinum band.
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Pepsi invited its customers to tweet their ideas for “the perfect proposal” for the chance to win an “IGI Laboratory Grown Diamond Crystal Pepsi engagement ring” valued at about $3,000. The diamond, according to reports, was made by boiling Pepsi to its most basic carbon form. The ensuing powder was then incorporated into the diamond-growing process.

Contestants are asked to include up to four photos and one video up to 30 seconds long and tag #PepsiProposal and #Contest. The winner will be announced on March 16.