The Evolution of Liquid Eyeliner（https://www.huanapack.com/product/eyeliner/hn5207dclear-empty-packaging-eyeliner.html） Containers:The initial liquid eyeliner containers were simple and functional, consisting of a slender tube with a thin brush attached to the cap. These early designs allowed for precision in application but often posed challenges in terms of product control and longevity. Recognizing the need for improvement, cosmetic companies began experimenting with different container designs to enhance the user experience