This 18 mm. black polypropolene cap, also known as an inverted dropper cap, is the perfect closure for our Euro bottles. They are not only child resistent with a push down and turn feature; they are also tamper evident, with a break bands that seperates upon being opened for the first time. These lids also come with a LDPE orifice reducer (commonly known as an inverted dropper tip) which helps to restrict the flow of the product when being poured. These are the prefect closures for any of our Euro style bottles.