网页2019年8月13日 · Plastic #2: High-Density Polyethylene (HDPE) Like PET, HDPE is a frequently used, safe plastic ntainer. It's denoted by a number 2 on plastic ntainers. HDPE products are safe and are not known to transmit any chemicals into foods or drinks, mait this plastic a low health risk variety, according to Chemical Safety Facts. This