A thermo flask is a household item that is used to keep things warm or cold for a long time. What is the use of silvered wall in thermo flask?
![flask noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com flask noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com](https://www.oxfordlearnersdictionaries.com/media/english/fullsize/l/lab/labor/laboratory_equipment.png)
flask noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
![What is use of thermal flask? Describe its construction. Why it is evacuated from double walls? What is the function of shining walls of glass? What is use of thermal flask? Describe its construction. Why it is evacuated from double walls? What is the function of shining walls of glass?](https://byjus-answer-creation.s3.amazonaws.com/uploads/29561_Physics_62a9e32bf152d33e0abfe74f_EL_Heat_Transfer-22_035508.jpg_img_upload_solution_2022-09-12%2017:23:26.267975.png)