Unit rates and unit ratios. A unit rate is a ratio that has a denominator of 1. A unit rate is also called a unit ratio. (They mean the same thing.). $\frac{5}{4}$ and $3:8$ and $40\mbox{ to }10$ are ratios, but they are not unit ratios. $\frac{1.25}{1}$ and $0.375:1$ and $4\mbox{ to }1$ are unit ratios. unit rate is also called a unit ratio. (They mean the same thing.). $\frac{5}{4}$ and $3:8$ and $40\mbox{ to }10$ are ratios, but they are not unit ratios.
I found the following references to Coca-Cola Zero launching in the US in 2005: 1  Associated Press March 21, 2005 announcement that the product would launch in June - http://www.nbcnews.com/id/725792...  Case study by ATTIK, which provided worldwide branding services, citing a 2005 launch - ATTIK.
But also read why Coca Cola actually was invented ? In 1989 Asa Candler, an Atlanta drugstore distributor, gradually bought all of the shares, and by 1891 he owned the entire company, for roughly $ 2,300 ! In 1892 he founded the Coca Cola Company, and the next year he patented the name, but not the product. In 1915, the success of the beverage had become so great that imitators emerged from everywhere, to rake in a crumb from his rich table. An absolute master stroke was the development in 1916 of a special patented bottle, the Coca-Cola bottle.