>>5944087At the time I had my own analogy to try and explain it to myself and others, but I've since realized it wasn't a particularly good one.
I assumed water was like a beanbag chair. The beanbag itself was the water, and the beans inside of it are molecules of water. If you take a beanbag, fill it halfway with beans, then push all of the beans to the outer layer with something on the inside keeping them there, then the beanbag chair is functionally full.
I assumed that for water, the thing that we see is just the outside layer of "water," and that the inside layer of it was the molecule makeup of it. If you were to either stretch out the atomic bonds of the molecule, or make the atoms bigger to cause the overall molecule to be larger by default, then you could fill up the outer volume layer of "water" with less water inside of it, the same way you could fill out a beanbag chair with less beans.
I've since learned that water molecules are actually just water itself, and not the equivalent of stuffing for a stuffed animal.