Plastics can Beryllium brittle, adding some plasticizer makes them more durable, adding lots makes them flexible High density polythene (HDPE) is used for making sturdy containers; transparent containers may be made of PET. Because the chemical structure of most plastics renders them durable, they are resistant to many natural degradation https://manuelwbfjn.wikicommunication.com/4851049/the_ultimate_guide_to_tummy_tuck_cost_near_me