The Polar Bottle Insulated Water Bottle is a kind of flask that keeps the hot beverages hot and cool drinks cool till long time. It is certified by CPSIA (Consumer Product Safety Improvement Act, 2008) and California Proposition 65. There is a twofold wall and insulated body of the Polar Bottle. The interior metal layer brings the sun rays back and thus, provides safety to the thermos. Its plastic is without Biphenyl- A and Phthalate. It contains LDPE No.4 (Low Density Polyethylene). Its weight is lesser. You can take it anywhere.