You mean to zero, definitely.
Lo Hudson

Can you explain this to an economically-illiterate plebeian?

My intuition is that as a minimum labour was invested into the creation of the product, and therefore the product has some cost regardless of the number of times it can be duplicated. Further, I’d imagine that the cost decreases proportional to the number of times it’s copied such that the cost approaches (but never reaches) zero (like y=1/x).