Double - layer glass, Adding charm like a piece of art. Keeps your coffee, tea, or drinks warm longer than others, Just like a cozy hug for your beverages. No more hot hands, and kids are safe around it. 650ml capacity, Big enough for the whole family to share. So easy to use! It's like a friendly helper in your kitchen. Made of double - layer heat - resistant borosilicate glass. Sturdy and reliable, just for you.