Huge Martini Glass Centerpieces

I am looking for huge oversized martini glasses for centerpieces. I would prefer them not to be glass, but if anyone has either glass or acrylic that would be great I am looking for between 10 and 15. I wouls like them to be as cheap as I can possibly get them for, even rent them. I am in the Orlando area and I wont be needing them for sometime, but I need to start planning and getting ideas as to where I can get them.