The Pepsi soft drink brand was first marketed in 1898 by Caleb Bradham, an American pharmacist. In its early days, the drink was called "Brad's Drink" and was sold as a remedy. In 1903, Caleb Bradham changed the name of the drink to “Pepsi-Cola” and registered it as a trademark. Over the years, Pepsi has undergone several changes and transformations, expanding internationally and diversifying its product line. Today, PepsiCo, the parent company, is one of the world's largest food and beverage companies and markets a wide range of products under the Pepsi brand, including Pepsi-Cola, Diet Pepsi, Pepsi Max, Pepsi Zero Sugar and other variants.