The YY Vertical Climbing Mug is a training accessory designed to strengthen the fingers while enjoying a drink. With a capacity of 300 ml, this mug is ideal for climbers wishing to combine relaxation and exercise. Instead of a classic handle, YY Vertical has installed a climbing grip on which to muscle your fingers. YY Vertical Climbing Mug specifications: Capacity: 300 mlDimensions: 8.2 x 9.6 cm Mug YY Vertical ---Climbing Mug C'est Extrême !