Thick Glass body, Plastic Glossy black rubber and neck, clear glass dropper, plastic white gasket for leak proof. Each bottle is individually packaged, so you need assemble them. First put the rubber inside the black neck, than insert the dropper on the head ,final put on white gasket on the dropper screw the body. Have two color choose, Matte amber, and Clear color body. Rubber and neck is black , clear dropper and white gasket, use for filling essential oil, essence, serum liquid etc.