MOOMIN Stainless Steel Mug, 350ml, with Lid, Double-Walled Vacuum-Sealed, Boxed, Perfect Gift (Ohana (IV))

[The Moomin Valley friends appear in stainless steel mugs!] [Double-walled vacuum structure] The double-walled structure creates a vacuum between the inside and outside of the mug, preventing condensation on the outside and reducing heat to the touch. It keeps hot drinks warm and cold drinks cool. [Heat and Cold Insulation Efficiency (Results of In-House Experiments)] Heat Insulation Efficiency: 95°C at Start → 67.6°C after 1 hour. Cold Insulation Efficiency: 4°C at Start → 5.6°C after 1 hour. *Heat and cold insulation efficiencies are estimates and are not guaranteed. *Heat retention efficiency is measured when hot water is poured into the mug at room temperature of 20°C ± 2°C and left for 1 hour after it reaches 95°C ± 1°C. *Cold Insulation Efficiency is measured when cold water is poured into the mug at room temperature of 20°C ± 2°C and left for 1 hour after it reaches 4°C ± 1°C. [Includes Sliding Lid] Keep the lid closed when not in use to keep the drink warm and protect from dust! (C) Moomin Characters TM