Taste the Difference: Ember Cold Tumbler is made of materials designed to maintain the taste of your beverage drink after drink, so every sip tastes like it did when it was first brewed. Keeps Drinks Cold: Double wall insulation keeps your drinks cold for 6+ hours and eliminates condensation on the outside of the vessel. Ready for Anything: Spill-proof with a sleek profile that fits most cup holders and makes to-go sipping a breeze. Includes 2 Sipping Options: Our versatile sliding lid offers both a traditional coffee cup experience and a straw sipping experience. Tritan straw included. Perfect Gift: Gift to others or yourself; this is the perfect gift that is sure to surprise and delight The all-new Ember Cold Tumbler was designed with iced coffee lovers in mind. For a long-lasting iced experience, it combines premium materials with on-the-go conveniences. The Cold Tumbler is crafted with temperature-resistant, double-wall insulated glass, keeping drinks cool for over six hours and minimizing condensation. Its high-quality borosilicate glass makes it durable and easy to clean, all while preserving the pure taste of your drinks. With its innovative 2-way lid design and subtle aesthetics, the Cold Tumbler makes sipping cold coffee, tea, and even water what it should be – effortlessly chill.