The soft drink company based in California is Shasta, a six-letter word. Shasta Beverages, Inc. is an American soft drink manufacturer founded in 1889 in Northern California. It produces a variety of carbonated and non-carbonated beverages, including sodas, juices, energy drinks, and mixers. The company is headquartered in the city of Hayward, California. Shasta has been a popular brand in the United States for over 130 years and is now available in many countries around the world.