A Roll-on bottle, also known as a roll-on bottle, is a relatively common type of plastic packaging bottle and is widely used by people. Roll-ball bottles usually have a small capacity. Rolling balls are installed on the bottle head so that people can apply evenly, prevent liquid leakage, and also have a massage effect. It is generally used as packaging for cosmetic eye creams, lipsticks, deodorants, face creams, essential oils, medicines, antipyretic gels, and children’s products. There are two types of roller balls on the head of rollerball bottles: plastic and steel balls. Generally, steel balls are used for cosmetic eye cream bottles, while plastics are used for cheap products such as lipsticks, depending on the price of the product.