The Shape of Space Silo or Space Silos

In my comment to Burmese scientists on 12 November 2010, I write about my thoughts about the SPACE. I write that I wonder whether it is enclosed in a sphere within a sphere. That is completely wrong. We do not know the actual shape of "this silo" enclosing the space where our universe or other universes exist? Is the silo of THIS SPACE in other shapes rather than in the shape of a sphere? Is there any silo at all? Has space no end and no beginning? There seems to be no answer to the actual nature of space? We can only think about the space in relation to an object as in the space in the room and the space in our universe. We can also talk about space and time? The rest about space is completely unknowable to me.