Tempered whiskey glasses are crafted with precision and care, undergoing a special heat treatment process that strengthens the glass and makes it more durable. The tempering process involves heating the glass to a high temperature and then rapidly cooling it. This results in a glass with increased resistance to thermal and mechanical stress, making it less prone to breakage. The tempered whiskey glass typically features a thick base and a refined design, providing a perfect combination of aesthetics and functionality.