<nitpick>
可口 (kě kǒu) does actually mean "delicious" -- you are thinking of 口渴 (kǒu kě) which means thirsty
</nitpick>
Admittedly, it is still a superior branding to Pepsi (百事可乐) which literally translates to "hundred events." Maybe this has something to do with how Pepsi has about 1/3 as much market share as Coca-Cola has in China [1].
[1] http://www.dailyfinance.com/2011/07/29/coke-sees-chinas-mark...