Is it permissible to donate scratched Teflon pots, knowing that they are harmful to health and the beggar does not wish to use them, or must they be disposed of?

The answer depends on the extent to which health damage from using these containers is proven. If their harm is established, then it is not permissible to donate them unless they are made suitable for non-harmful use, based on the hadith (definition): "There should be no harm or reciprocal harming." If their harm is not established or is merely a possibility, then it is permissible to donate them. The determination of harm should be referred to specialists.