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Published 2015
Sugar demand and consumption exploded in the 1920s and 1930s. The postwar crash in sugar prices allowed candy makers to sell chocolate bars at lower prices, and solid chocolate surpassed drinking chocolate in popularity. But the familiar wrapped candy bars did not appear widely until merchants put them adjacent to cash registers in grocery stores, drugstores, newsstands, and cigar stores. See candy bar.
The arrival of modern refrigeration led to affordable frozen novelties. In 1919