Let's say you had a hollow metal cube. A hole is drilled through the side, and a straw is put in. The only way for anything to get in or out is through the straw. The container is filled fully with water. Is it possible to get the water out by suction?
I thought of this question after watching a VSauce video where he said the following:
You don't really suck liquids up through a straw, you just cause the air in your mouth to push against it, through the straw less than usual.
Obviously, I know that in real life, the container flexes, and some water can be sucked through. However, in an unflexing container, can the water be sucked out?