how to store a quilt?

What is the best way to store a quilt?
what is the most common way to store a quilt?

i have seen the archival boxes that are $30+...is this what i should use?

anyone have any tips or places they know where to get boxes for these kinds of things.

I am a former collections curator.  I stored quilts for the museum where I worked in one of two ways.  I used the acid free boxes from companies like University Products or Gaylord Brothers and stuffed the folds of the quilts with bunches of acid free tissue paper (available from the same companies).  The tissue helped to prevent creasing.  You can also purchase tubes, cover them with Mylar, then roll the quilts onto the tubes along with a layer of acid free paper.  Then wrap the whole thing with Tyvek or unbleached muslin as a dust protector.  Then it is best to hang the tubes so that the quilts aren't resting on only one side, or, move them periodically.

My grandmother always told me to store a quilt rolled rather than folded and to take them out and reroll every few months.