These refillable vessels are designed for the application of user-generated essential oil blends. Constructed from high-density polyethylene (HDPE), the housing is generally stable, though caution is advised when using high concentrations of citrus-based oils which may interact with the plastic.
Mechanical audits suggest the potential for friction if the DIY formula lacks sufficient lubrication. Additionally, maintaining a sanitized housing is necessary to manage microbial risks inherent in refillable systems. The snap-on cap serves as an effective evaporation barrier for volatile contents.
The system offers high portability and cost-effectiveness for bulk blends. Users should monitor the roller-ball mechanism for consistent rotation to prevent mechanical drag on the skin surface.
