A high-quality and lightweight thermos flask. The high-quality vacuum insulation technology by Thermax ensures maximum preservation of cold or hot temperatures and maintains the contents on temperature up to 3 times longer than comparable thermos flasks! Special lightweight stainless steel, copper plated for optimum insulation and also 20% lighter. The special construction renders it virtually unbreakable and dent resistant! So the insulation hardly diminishes, even after intensive use.