Balsam for investors: Baerg Marti’s premium-grade vinegars are also stored for five years in 30-litre barrique kegs on the Mutthorn, high in the Bernese Alps, 3,000 metres above sea level. This matures the Mutthorn vinegar into a first-class and real capital investment that multiplies in value thanks to its highly prized vinegar crystals, which form slowly as the forces of nature gradually take their course.