This is such a difficult thing to do. Replaced baggies with reusable silicone. Use only glass or ceramic dishes. Use reusable bags at the grocery store. Got little reusable fruit and vegetable bags so I'm not using the disposable bags at the grocery.
But at the end of the day, goddamn every food or product I buy comes wrapped in plastic one way or the other, and there's little I can do about that.
The trick is that it has to be a threat, and if we're being honest then the more money and power you have the more obviously threatening it must be.
DON'T SAY: "I'm going to kill you."
DO SAY: "It would be great if you died right now."
And if you have influence and/or money, feel free to say: "I wish someone would kill you."