Plastic with the #3, 6, or 7, on the bottom should be avoided...

The next time you use a plastic container or bottle, you might want to look at the little number inside the triangle recycling symbol. Plastics with the recycling codes 3 (phthalates), 6 (styrene) and 7 (bisphenols) should be avoided unless they are labeled as “biobased” or “greenware,” which do not contain these chemicals.

“More than 10,000 chemicals are allowed to be added to food in the U.S., but the Food and Drug Administration (FDA) is unable to ensure all of those chemicals are safe,” the AAP added.

https://www.ecowatch.com/pediatricians-warn-against-plastic…