This glass cup can not only be drunk with a straw, but also you can drink your favorite beverage directly to your mouth by opening the small lid on the cup lid. The lid of the cup is sealed with a rubber ring, which can effectively prevent leakage. Whether you have big or small hands, you can easily hold these glass cups. It come with anti-scalding and anti-cold leather case makes the cup look advanced. So glass tumbler is very suitable for outdoor travel. It can hold any beverage you like, such as: water, juice, iced tea, cold brew coffee, beer, etc. It is made of durable glass. The leather heat resistant sleeve and PP leak-proof lid are food grade. It is also perfectly clear, allowing you to see exactly what you are drinking and how much is left.