Ran across a new cooler option that I thought I would share. I have used some of their other products and they are pretty solid, so I figure these will be as well. Not too bad of a price, I can't wait to see some larger cooler sizes as well.
http://vibekayaks.com/collections/accessories/products/vibe-element-20l-cooler?variant=10344033283
http://vibekayaks.com/collections/accessories/products/vibe-element-20l-cooler?variant=10344033283