Concord Grapes

Recently I bought a carton of Concord grapes.  They are a deep blue-black color and smell intensely of grape soda or grape candy.  The "grape" flavor in most things is really "Concord" flavor -- they're not much like other grapes.  If you squeeze them, the skins pop off.  We used to grow these when I was little.  They made the most amazing, velvety, jewel-purple grape juice and grape jelly.  And grape syrup because usually one of the jelly jars wouldn't set.