Coke Loses Quiznos Sandwich Account  ATLANTA (Reuters) - Quiznos Sub, the third-largest U.S.  sandwich chain, said on Wednesday it signed a deal to serve  PepsiCo Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PEP.N target=/stocks/quickinfo/fullquote"&gt;PEP.N&lt;/A&gt; drinks in its U.S. outlets, ending a  23-year relationship with Coca-Cola Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KO.N target=/stocks/quickinfo/fullquote"&gt;KO.N&lt;/A&gt;