Butterfly Stool, Rosewood drinkware YSS (Yasuki Specialty Steel) from Color:Blue YSS (Yasuki Specialty Steel) from Hitachi Metals in Japan's San'in region uses high purity iron sands and traditional Tatara iron making techniques to achieve exceptional hardness and toughness this soy sauce cruet was designed to have a tight seal that will prevent your sauces from dripping or leaking by utilizing a glass cutting technique that allows them to cut into the glass thin enough to allow air to pass through but prevent any leaks at the stopper and drips at the tip among other museums worldwide it is part of the permanent collections at the Museum of Modern Art and the Louvre Museum