These beautiful tumblers are handmade in Japan following ancient Japanese glass blowing traditions. Each glass comes with a handmade wooden box, making these glasses an incredible gift. Each whisky glass is carefully handcrafted from high-quality glass with a timeless design. These are not just tumblers, they are a work of art. Solid and heavy base design: The thick walls and heavy weighted base are extremely durable and keep your drink insulated at the perfect temperature for longer, whether you prefer your drinks ice cold or at room temperature. Enjoy without worry: These whisky glasses are highly durable will retain their sparkle for many years to come. When it comes to caring for these glasses, please avoid a dishwasher and instead handwash.