Latest Insulation Structure: This coffee mug had used the heat preservation technology after the updated. The constant temperature is longer and more stable. Function: When you are driving, in office or at home, if the reusable coffee cup topples on the floor, it will not spill or leak out. The lid will remain tight. One coffee cup has many uses: In addition to holding coffee, it can also contain all kinds of drinks you want. Such as cola, juice, soda and so on. Before using coffee cup to hold different drinks. Material: The double-wall vacuum insulation made of high quality professional double-layered stainless steel, durable and prevents the increase of bacteria, also keeps drinks odor free. Appearance: You also don't worry about the outer surface being easily scratched and cleaned.