Scottish drinks maker A.G. Barr said on Tuesday third-quarter revenue rose 21.4 percent, aided by strength in its core business, and current trading remained in line with its expectations.

Economic conditions continue to be challenging and the soft drinks sector is highly competitive however, we remain confident of delivering our plans for the full year, the company said.

A.G. Barr, best known for its bright orange Irn Bru drink, said like-for-like sales rose 10.8 percent for the quarter ended Oct. 31.

The Cumbernauld-based company said operating margins remained in line with its view.

Its Rubicon brand has continued to see good overall year-on-year performance, A.G. Barr said.

UK-based Rubicon, a seller of juices made from fruits such as mango, papaya and guava for over 20 years in England's south-east, was acquired by A.G. Barr in August 2008. (Reporting by Shivani Singh in Bangalore; Editing by Deepak Kannan)