SEATTLE — Starbucks Corp. is swapping foam for fizz in its newest non-coffee concept. Figuring heavily into the java giant's growth strategy lately have been the integrations of La Boulange bakery products, Teavana teas and Evolution Fresh cold-pressed juices. Now, the company wants a taste of the $100 billion global cold carbonation industry, by leveraging its customized beverage retail platform with handcrafted sodas. "Carbonation, that is a new category for us," said Howard Schultz, chairman, president and chief executive officer, during an Oct. 30 earnings call with financial analysts. "The test results in Austin (Texas) and Atlanta and in Japan and Singapore are very encouraging. We think it's a significant opportunity, and again, we learned a lot over the last few years with our refreshment category, that we have other than coffee and the opportunity in coffee, we have an opportunity to provide a need state in the afternoon and the evening around refreshment."