Plastic #2: Most milk jugs, detergent bottles, juice bottles, and toiletries bottles are made of #2. This plastic is considered safe.
Plastic #3: This is used to make food wrap, bottles for cooking oil, and plumbing pipes. #3 is not considered safe to cook food near it. NEVER cook using food wrap in a microwave even if the wrap says microwave safe!
Plastic #7: This plastic number is a mix. Polycarbonate are in thiscategory, including BPA. Avoid number 7 whenever possible.
I try to avoid plastic whenever possible and just stick to glass.