ROI brand is owned by HOTEL SAVA ROGAŠKA, d.o.o. in SLOVENIA.

ROI, the most magnesium-rich mineral water in the world, was founded in 1647 and took inspiration from the waters unique, centuries-old history and the legend of Pegasus. The Roitschocrene mineral water from Rogaška originates in the center of the most tectonically diverse region in Slovenia, where there are three regional tectonic faults. This unique geological and hydrogeological composition is an invaluable source of two natural springs of mineral and thermal water that spring from a depth of about 600 and 1700 meters.

Company Web Site : https://www.roiwater.com/