The Stainless Vacuum-Insulated Mug in 300ml is designed in Japan. The lightweight mug can be used in the home. camp or backcountry and offers lasting insulation with vacuum-insulated double walls. The Stainless Vacuum Double Wall 300 Mug weighs just 110g and features collapsible handles for compact storage. Pair the Stainless Vacuum Double Wall 300 Mug with the Tableware Set Single for a dining set.