Generic mixture of blackberry fruit juice, sugar and pectin. Pectin is a fiber which, when heated with sugar liquid, gels - thus, jelly. Blackberries are a black or dark purple juicy seedy raisin-sized fruit that grow on brambles. Uncommon as a drink ingredient, but seen in the BLACKBERRY DEMI TASSE.
Generally available. Distributed world-wide. Available for on-line ordering in some markets.
other preserve or jelly. Other blackberry-flavored product.