Most HDPE bottles are made of PE, a resin material obtained by polymerizing ethylene. PE has no smell and feels a bit like wax. It can be stored at low temperature for a long time (the temperature is between minus 100 and minus 70° Celsius), and it is very stable and can not be corroded by some things with strong acid and alkali.. If it has normal temperature, it will not be mixed with ordinary solvents, and it will not absorb much water and conduct no electricity. For more about HDPE bottles, please read the following words.