Geiser is Sanmy's flagship brand, synonymous with 'soda' in Spain. Established in the late 19th century, Geiser offers a range of beverages, including the iconic Supersiphon—a calorie-free carbonated water ideal for cocktails—and flavored soft drinks like lemon, orange, and non-alcoholic mojito. In 2000, Sanmy introduced Europe's first recyclable PET siphon under the Geiser brand, revolutionizing access to quality soda. The brand's vintage siphons remain popular for their timeless design and historical significance. Geiser continues to be a symbol of tradition and innovation in the Spanish beverage industry.