Leomund's Tiny Hut - Poison Gas

Quote from Tarod_ >>

 IMO, if water were an object or a collection of objects, then you could not Teleport to that space or occupy freely that space:

Occupied Space

A space is occupied if a creature is in it or if it is completely filled by objects.

Unoccupied Space

A space is unoccupied if no creatures are in it and it isn’t completely filled by objects.

A couple of threads where water and space were debated:

- Can You Misty Step Through A Door With a Window? What Is A Space You Can See?
- Teleportation Circle and "nearest unoccupied space"

 See, finally a sensible point against it being an object. 

This then implies that water is an environmental condition, if you're able to teleport into or move freely through it. That it flows and displaces the same way air does. 

Which would still mean water can't flow through, because the environment inside explicitly remains dry.