The Pexpo Piano Thermosteel Insulated Flask is made using double-walled Triply Vacuum Technology and 18/8 food grade stainless steel which does not rust and retain and transfer flavors. The vacuum insulation on the flask keeps drinks hot or cold for , and also makes it easier and safer to handle it. The flask is odorless and if rinsed properly between uses, it will retain this characteristic. It is leak-proof and sweat free, so you can carry your beverages when on the go without worrying about spillage. It makes for a great gift too. The flask is made in India and complies with BIS and international standards of quality.