Why are there 2 holes in a soy sauce bottle?

Why are there 2 holes in a soy sauce bottle? The question is classic,although we always ignore and never think about it clearful in dairly.

Actually, one hole of them is for the application of  the soy sauce exited in the bottle. And the other one is so that air can enter the bottle to replace the liquid that has just exited the bottle. It is designed with two holes to allow liquid to freely exit in the bottle, Because the holes are tiny (to properly control the amount that comes out). So the most important for us is to pour out sauce slowly if there would be no sauce spilling on your hand.