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Avoid non-stick cookware (Teflon) as it gives off perfluorooctanoic acid, something you do not want to be ingesting.
Instead of a rice cooker which has a non-stick lining, I use the Instant Pot which can be used for rice, stew, soup, meat, eggs, veggies, and so many other things. It has a stainless steel lining. It does need to be offgassed, like any appliance.
Avoid aluminum and copper cookware, as it leaches. Stainless steel is preferred with glassware used where possible. Antique glassware/Crystal wine glasses can leach lead.
Avoid plastics and Styrofoam containers, including tin cans and canning jars lined with plastic, which leach chemicals into food. Unlined aluminum and tin cans can leach metals into the food.