Traveler's Factory Stainless Steel Bottle 500mlAn original stainless steel bottle made in collaboration with Rivers, which develops products focused on drinkware. The thickness of the stainless steel is made as thin as possible, and the vacuum double structure with a copper coat on the inside prevents heat from escaping and enhances the heat and cold insulation effect. By making it thinner, we have achieved an ultra light weight of 200g with a capacity of 500ml at the same time. It's light enough