Plastic bottle holds stoning oil, flux, solvents and other liquids. Special stainless-steel lid allows pumping of solution into the shallow well on top of bottle. One-way valve keeps solution in that shallow well, which prevents contamination and eliminates odors. For best results and to avoid clogging, the well should be emptied, and the cup cleaned between uses. Flux not included. Ideal for dispensing solutions that would otherwise evaporate. 4 oz. capacity.