This is a JK Vacuum Sling Thermos Cup.
It is made of 304 food-grade stainless steel.
The vacuum insulation keeps beverages hot or cold for several hours.
It features a leak-proof design and a carrying strap for convenience.
Available in various capacities, including 350ml, 750ml, and 1000ml.
The cup has a high-class, slim design, making it suitable for travel or the office.