Vacuum Insulated Double Layer Construction, Easy to Store, Convenient to Carry. Vacuum Insulated. Layered construction provides high heat and cold retention. Cold Retention: Keeps cold under 11°F (11°C) (6 hours), Keeps hot over 154°F (70°C) (6 hours). Mouth is designed with a milk bottle that is easy to drink from anywhere with 360°C.Even with the design of a design, this product will fit ice for your home use. 2.7" L x 2.7" W x 5.6" H