Versatile to be used as the coffee cup, tea cup, water cup, and beverage cup. With Ceramic inside, your coffee should taste how you intended. Unlike stainless steel, our real ceramic interior keeps your brew pure and free of lingering odors, oils, and "old penny" tasting notes. Double wall vacuum srainless steel outside keeps drinks ICED over 5 HOURS & HOT over 5 HOURS. Thanks to this flask, you can easily make your tea and carry it with you at any time.