Features: *Lightweight portable --Mini thermos cup is 350ml small body, about 190g light weight. It's portable wherever you go. *Long-acting heat preservation lock cooling --No matter it is the daily habit of drinking hot water, or summer travel want to drink cool, mijia mini thermos cup can always keep long heat preservation and cold. *SUS 304 stainless steel safety material --SUS 304 food contact grade stainless steel grinding inner core, material accord with food safety, oxidation resistance, corrosion resistance, easy to clean, healthy drinking water. The cup mouth is made of PP material, smooth and comfortable to touch. *Double vacuum&vacuum side copper plating --Mijia mini thermos cup adopts stainless steel double-layer vacuum technology, and vacuum side copper plating technology, reducing vacuum radiation, effectively blocking temperature conduction and convection, delaying heat dissipation of liquid inside the cup, heat preservation and locking. *Heat preservation test --Under the indoor temperature of 20°C±5°C (the cup is placed for 30min), pour 100°C water into the cup to the lower end of the sealing cover (plug). When the water temperature drops to 95°C±1°C, immediately tighten the lid and start timing. After 6 hours, the temperature of the water in the cup is not be lower than 58℃. *Cold preservation test --Under the indoor temperature of 20C±5℃ (the cup is placed for 30min), pour ice water into the thermos cup to the lower end of the sealing cover (plug). When the water temperature rises to 4℃±1℃, the lid is closed. After 6 hours, the temperature of the water in the cup is no higher than 12°C. Brand:Mijia Model:MJMNBWB01WC Color:Black, White, Pink, Blue Heat preservation efficiency:More than 58°C (6 hours) Cold preservation efficiency:Under 12°C (6 hours) Material:PP, silica gel, 304 austenite stainless steel Capacity:350ml Weight:190g Size:61x 61x185mm