Empty plastic lipgloss tube features a double bottle structure and its specific collar insert inside the bottle that makes it three layers bottle visually. They come with plugs to clean the liquid of the wand, provide a good seal and keep the inside formula fresh. 6ml lipgloss tube can be used for lipgloss, lip stains, lip plumper, lip glaze, lip tint, liquid foundation, concealer, contouring, and other liquid cosmetic products.