While cataloguing our vast inventory of mystery glass items, we came across these puppies. They are clear, 6-7/8"tall x 6" wide, and about 3/16" thick. The flutes are 1/2" wide and vertical. Because they have finished edges (i.e. not sharp), we can only guess that they once served as lamp or chandelier parts. You might use one as a glass box lid, or perhaps as a trivet.
For years they have been nestled in cardboard boxes on a shelf, but now they have seen the light of day. We haven't the heart to return them to the shelf, effectively banishing them once again to oblivion. Let's work together to find a home for them, shall we?