Green 30 ml glass euro droppers with white tamper evident caps can make an excellent choice for packaging products like aromatherapy oils, pharmaceuticals, food products, and much more! The white caps feature orifice reducers that allow for gradual product dispensing when installed into the essential oil bottles. Once the white ribbed cap is screwed completely on the bottle, the orifice reducer will remain snug in the opening, ready for use. The tamper evident ring will detach from the rest of the cap when the essential oil bottle is first opened for added security.