HDPE: High density polyethylene also known as PEHD Polyethylene high density.

HDPE one of the most widely used types of plastic. Usually found in a wide range of domestic products: drain pipes, plastic bags, milk bottles, refillable fruit juice bottles, jerrycan containers even garden furniture.
HDPE is food grade approved, lightweight yet tough, offering excellent impact resistance and resistance to chemicals and moisture, which is why HDPE is used to package many household detergents, bleaches and general cleaning products. Perfect for beauty, bath and healthcare products too.
HDPE disadvantages are few but amongst these are poor temperature capability, poor weather resistance and is flammable material too.