1.5ml volume for teeth whitening pen, twist design, precise dosage control, for filling teeth whitening gel, or oil products Detailed Description:1. ... : The packages for filling cosmetics bases such as the lip gloss, face moisturizer, hand moisturizer, dark cirlce remover, wrinkle remover, eye ... This pen also can be matched with other type applicator for other products field, such as any kinds of oil, ...