TSG's machine-made glassware are made with "Fine Clear", a high-grade soda-lime glass material composition developed by Toyo-Sasaki Glass. Fine Clear achieves supreme clarity and brightness comparable to crystal glass, and is as strong as conventional soda-lime glass. Fine Clear makes an perfect material for glass tableware, and is a prime example of TSG's relentless pursuit of product excellence.

Carefully selected raw material and state-of-the-art glass melting technology are applied to minimize iron ion (Fe2+) content. Iron Ion is known to have a negative effect to the color hue of the glass.