Though both products are marketed by the same company, this version is a cheap knockoff of the classy "
DCI I Am Not a Paper Cup". Though it initially appears similar, there are easily visible differences. The lid does not have the indentation that makes it more comfortable for your upper lip. On both the Eco Coffee Cups that I received, there are visible defects in the surface. More importantly, this double-walled cup does not have a safety pressure outlet on the bottom, as does "I Am Not a Paper Cup". This would theoretically increase the risk of cracking if you micro-waved contents to a high temperature, as the heated air has no place to expand into. Lid fit is looser than Not a Paper Cup, though I haven't experienced actual leaking. Finally, using a measuring cup, my two cups hold 11 oz., not the advertised 12 oz.
Bottom line: The original item, I Am Not a Paper Cup, is a classy and durable item. It costs a few bucks more. The difference between Eco Cup and the original is clearly an example of "you get what you pay for".