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 preventing heat from being felt when touched. 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