Board Thread:Spoilers!/@comment-6175354-20150730230428/@comment-24674051-20150810204305

The antioch chalice is a cup that was originally thought to be the Holy Grail, but was later determined to not be the Grail.

By the way, the Chalice of Antioch is a real item that is sitting in some museum somewhere. and it is more ornate than the one pictured with Charming.