[quote name='pittpizza']WHy can't you/we drink coke? It's not leavened bread so why can't we eat it?
Also, how about "wraps", like you'd get at subway, they don't "rise" so can we eat them?[/quote]
I think that has already been answered. It's the corn. For many Jews, corn is forbidden on Pesach. That is why this version spoken of has sugar cane and is therefore kosher.
Torah forbids chametz. The inclusion of corn (and many other things) as forbidden is mainly an Ashkenazi practice and found in Mishna. Some reasons are that it is harvested, processed and ground into flour in a similar manner to chametz. So people might think it was okay to eat chametz if they eat some of these other grains/beans. Also, many plants process both types of food, so there is no guarantee that you aren't eating chametz if you eat corn products.
About the wraps, it depends on what's in them.