Is using corn for disposable products wasting a valuable food source?

Did you know there are 6 main types of corn? 

The corn-based PLA products we carry like deli containers, salad bowls and clamshells are made from No. 2 yellow dent field corn, the most abundant and cheapest source of fermentable sugar in the U.S. Also known as "grain corn" field corn is not ideal for human consumption due to poor taste and is primarily grown for livestock feed and ethanol production among many other things. Some "food products" like high fructose corn syrup are made from dent corn as well. 

The corn we buy to eat are varieties of "Sweet Corn". Some "popcorn" varieties of corn are cultivated specifically for popping. Flour corn, pod corn, and flint corn make up the remaining 3 varieties.