Double wall vacuum insulated water bottle capacity-1000 ml, inner and outer side of bottle is made from 304 grade steel which is rust free and 100% food grade. Vacuum insulation technology locks in temperature to preserve flavour and freshness to keep beverages cold and hot for a long period of time. Perfect size not too big, not too small, easy to carry loop, condensation free and leak proof lid. BPA-Free & toxin free -Easy to clean -use mild soap for cleaning the Flask and advised to be kept open when not in use to avoid odor it can be used for outdoor sports, gym, work trip, home, or travel.