Nestle's Perrier Vittel has successfully upped its control of the Hungarian mineral water company Kekkuti Asvanyviz Rt to 97.16% from 87% following a public buyout offer, Nestle said on Wednesday. Nestle said in the bourse gazette that during the 30-day offer period it bought 238,641 of Kekkuti's 306,264 A-series shares it did not already own.