This unique vacuum insulated tea cup with transparent glass lid is made of food-grade stainless steel inside and outer. The double-wall vacuum insulation is suitable for containing any hot or cold beverages and keep their temperature for a long time. It fits most car cup holders. This cup is very suitable for making tea. The water and tea leaves are separated, you can enjoy fresh and hot tea anytime anywhere. It also prevents water from flowing too fast and chocking water, reduces spills, especially on the bus or walking. It's the best choice as a gift for family members or friends. Custom logo is available.