Britvic, a British producer of soft drinks, on Monday reported a rise in revenue for the third quarter. For the third quarter, the company posted a revenue of £502.9 million ($643 million), up 6.3% from the same period last year, with a 2.2% volume growth and positive price mix. In Britain, revenue grew 6.6% from the prior year, with both the retail and hospitality channels in growth. In Brazil, revenue increased 48.1% from the last year, helped by growth from the existing brand portfolio and continued acceleration in energy following the Extra Power acquisition. For the year-to-date period, t…