Pour your favorite beverage in and enjoyGCoas long as you like! Soak the tumbler under water or a running tap for a minute to activate the cooling effect Tumbler stays cooler than the ambient temperature Chalkboard finish on the outside lets you personalize your tumbler Made with food-safe ceramics Dishwasher safe Includes two 12.9 fl oz (0.568L) tumblers Designed for Magisso by Simon Stevens Red Dot Award 2015 winner A better way to enjoy a cold one. Magisso COOL-ID Tumblers let you keep your favorite beer or drink colder, longerGCoeven on the hottest days! Just hold the tumbler under water or a running tap for a minute to start the cooling effect, fill with your beverage of choice, and enjoy! The COOL-ID Tumbler will be cooler than the ambient temperature, and itll stay cold for hour so you can keep the beer flowing. Plus, it stands out from the crowd, and you can stand out as well by personalizing your tumbler with a touch of chalk and creativity. Enjoy colder drinks this summer. Order your Magisso COOL-ID Tumbler 2-Pack from Brookstone today!