2 Vintage Fenton Aqua Blue Hobnail Salt Cellar. A salt box, also referred to as a salt pig or salt cellar, is a storage container for salt that is usually kept near the stove for easy access while cooking. It allows busy cooks to grab the perfect pinch of seasoning while cooking and expertly flavor their dishes. One is light blue, the other is a deeper blue and seems to be frosted. The light blue one has some minor chips on the hobnails(see picture for details) the deeper blue seems to be free of chipping. Nice vintage condition. A fun set to start your collection!