Periogen Oral Rinse - The Only Product in The World Clinically Proven to Reduce Dental Tartar Buildup 3 Ounce (Pack of 1) is up for auction in Beauty & Personal Care. The current bid is $11.00, 61% below the $28.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.