A high quality vaccuum flask. The high quality vaccuum flask technology of Thermax® ensures maximum retention of warm and cool temperatures and keeps the contents warm for up to 3x as long as comparable vaccuum flasks! Special lightweight stainless steel, coppered for optimum insulation and also 20% lighter. Due to the special construction, practially unbreakable and undentable! As a result the insulation hardly lessens even after intensive use. With other vaccuum flasks a dent leads to an immediate loss in insulation. Comes with a top with also serves as a beaker with a practical knob underneath it. Includes 50 year guarantee!