Since these tools come into contact with substances for inhalation/consumption, they must meet strict chemical safety standards. Ensure products are compliant with FDA food-contact safety regulations or EU REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). If the tools are coated (e.g., rainbow PVD coating), verify that the coating is lead-free and non-toxic. Requesting a Material Safety Data Sheet (MSDS) or a RoHS certification from the supplier is a professional necessity to avoid customs seizures or legal liabilities.