The proper blend of spices, sugar and vinegar with selected vegetables is the secret that gives pickles crisp texture, potent sweet and sour flavor and keeps them firm. Pickles are low in calories, contain no fat and are one of the oldest delicacies. Pickling is a way of preserving vegetables, where vinegar plays a crucial role. It is said that the method of preserving foods with vinegar was discovered 4000 years ago and clay containers were originally used to store them. References of the practice were found in the Bible, while the method began to spread widely in Europe in the 16th century.