You will never find a better travel mug. The Glassen is great for any morning beverage, and is specially designed to keep your drink warm (or cool) throughout your travels. The Glassen is hand made from glass, and the food grade silicone cover and grips are removable for washing. This travel mug holds approximately 12 ounces and fits perfectly into most cup holders. It is made with borosilicate glass which can withstand high temperatures, and is double-walled to protect your hands while holding it. The Glassen travel mug is available in five fun colors, allowing you to personalize your mug in style, and is perfect for any tea drinker on the go!