Why Care About Baby Safe Cookware?

Unlined copper and aluminum are reactive metals and cookware made from these should not be used for slow cooked tomato/creamy sauces. The acidity may react with the metals, imparting a bitterness to the food [3]. Coated and lined cookware work better.
Caution: Coatings on Non-Stick Pans
Why Care About Baby Safe Cookware?

Unlined copper and aluminum are reactive metals and cookware made from these should not be used for slow cooked tomato/creamy sauces.
Is Cast Iron Cookware Safe for Babies?

Cookware made of cast iron is widely used, and finds application in searing. And while it can be said to be safe, it has a tendency to leach iron which happens to be a powerful pro-oxidant.