Glass ampoules intended as primary packaging for drug products may be reviewed by FDA as drug-contact components. Importers should confirm whether the ampoules are classified as finished packaging or as drug-delivery components, as the regulatory pathway differs. Consulting a licensed customs broker and the relevant FDA guidance is recommended.

Subheading 701020 covers discrete closure articles — stoppers, lids, caps — designed to seal containers, while 701090 covers the containers themselves (bottles, jars, flasks). A glass bottle sold with an integral glass stopper as a single unit is typically classified by the container's subheading; loose closures sold separately fall under 701020.