This is Pigeon's Therminox Stark vacuum flask made of high quality âDouble Walled Stainless Steelâ (SS304). This product has BPA free material with a flip type lid to make it easy for you to enjoy every sip. This product has a skid proof bottom using rubber material which will reduce spillage accidents and even reduce noise while placing the bottle. It is suitable for both the hot and cold water to sustain its temperature for almost 48hrs. This product is organic and a replacement to plastic. These bottles are designed to be used in office house traveling bags car gym schools and any other places. âSTAY HYDRATED EVERYWHEREâ