Freezer packs for coolers (about 5x5 and 8x10 inches), still frozen. At least 25-30.
They are in silver pillow packs with dry ice too.
(Came with online groceries, but I have all the freezer packs I need!)
Location: Chevy Chase, DC near American City Diner
30 or so freezer packs (still frozen), Chevy Chase DC 20015