Schott Zwiesel Tritan Pure has a modern, crisp, elegant design that is sure to delight. The fine appearance is only the beginning of the story. This lead free Tritan® Crystal is a patented innovation, replaces lead content in fine crystal with titanium and zirconium for enhanced durability and sparkling clarity. Tritan® Crystal is scratch, chip and break-resistant! The look is for special occasions, but it is dishwasher safe so you can use it every day. Each glass is tempered at the rim, the stem bowl connection and the stem foot connection, the 3 places most prone to breakage. The tempering makes these glasses quite resilient.