The flask is very visually appealing and makes a high-quality and well-made impression. In the first few days I have filled only hot water and even after 6 - 7 hours, the water still has a temperature of about 70 ° C which is sufficient for the normal working day. The capacity of 1 L is sufficient, 0.5 are for day use often a little bit. I would recommend the flask and would order them again!