Overview
An ampoule is a small glass container sealed by melting its neck closed after filling, so the contents are enclosed in glass with no cap, liner or thread to leak or let air in. Borrowed from pharmaceutical practice, it has become a premium skincare format for unstable, high-potency actives.
Each ampoule is a single dose opened fresh, so there is no in-use oxidation or contamination — the core selling point for vitamin C, retinol and other actives that degrade once exposed to air.
