A plastic cosmetic tube is a small, tube-shaped container used to hold various cosmetics and personal care products. These tubes are made from different types of plastic, and can be either disposable or reusable. Cosmetic tubes come in a variety of sizes, and can be used to hold anything from lipstick to foundation.While some people may prefer using other types of containers for their cosmetics, such as glass jars, plastic cosmetic tubes have a number of advantages. First, they are lightweight and easy to carry around in a purse or makeup bag. Second, they are often cheaper than other types of containers. And finally, they are generally more convenient to use, since most have screw-on lids that can be easily opened and closed.