Unique whiskey glasses are the only true precision glass sculpture of Mount Everest in a whiskey tumbler. Featuring a solid glass Mount Everest design, they are not only beautiful but functional too. The glasses require no aerators, ice, or whiskey stones. Simply place them in the freezer to keep drinks chilled and give your whiskey a swirl to let the custom cut glass aerate it. The proprietary Chill Charge Exchange System, made from durable X1 Crystalline, chills and aerates the whiskey in just 18 seconds. Enjoy a pristine, unadulterated drinking experience, without ice. So, whether you're a whiskey connoisseur or looking for the perfect gift for one, these Mount Everest whiskey glasses are sure to impress.