Comment by bee_rider

If you hold a rubber duck under water and squeeze out the air, it will fill with water and still be a rubber duck. If you send a rubber duck into space, it will become almost completely empty but still be a rubber duck. Therefore, the liquid used to fill the empty space inside it is not part of the duck.

I mean apply this logic to a boat, right? Is the entire atmosphere part of the boat? Are we all on this boat as well? Is it a cruise boat? If so, where is my drink?