Make it simple to dispense your MMS Citric Acid Activator. This cap fits perfectly on the 4 oz MMS green bottle or any bottle with a 20/410 neck. Simply insert a syringe tip into the special adapter hole in the cap, invert the bottle, and draw out exactly the amount of drops you need! This same set up can also be used to dispense therapeutic oils from a 5 ml and 10 ml vial. When dispensing Citric Acid to activate MMS do not cross-contaminate. Its best to not use a syringe for both instead use the blue adapter cap and 1 ml syringe for the citric acid and then use the flip spot closure for the MMS bottle.