Plastic. It leaches chemicals from everywhere and disrupts your hormones among other things. "BPA free," just has slightly lessor problems. Don't heat/microwave in plastic containers, discard of old plastic pitchers, avoid reusable plastic cups, plates, bowls, silverware.

Most of the time your risk is low (from things you can make a difference in), but re-use/worn plastic, and using plastics with extreme, especially hot, temperatures can be avoided with a small bit of consciousness.