This pack contains 50 or more small amber glass bottles, usually 5ml in capacity, specifically designed for samples, testers, or single-use portions. The key feature is the inclusion of a black orifice reducer insert (also known as a reducer cap) fitted into the standard screw-on cap. This insert has a tiny hole that allows oils to be dispensed one drop at a time, providing excellent control and preventing spills or over-pouring.

These bottles are indispensable for businesses selling essential oils, allowing customers to try small amounts before committing to larger purchases. They are also useful for DIYers to create tiny batches of experimental blends. The amber glass protects the contents, and the reducer cap makes them much more user-friendly than bottles requiring separate droppers.