The item is a JK Vacuum Sling Thermos Cup made of 304 stainless steel.   It has double-wall, vacuum-insulated construction, which keeps beverages hot or cold for extended periods (e.g., 8-24 hours).   The material is durable and sanitary stainless steel, suitable for everyday use.   It features a slim, light, and compact design with a leak-proof cap for portability.   The capacity is commonly around 600ml. Specifications Key Features The item is a JK Vacuum Sling Thermos Cup made of 304 stainless steel.   It has double-wall, vacuum-insulated construction, which keeps beverages hot or cold for extended periods (e.g.,…