Methods, devices, and systems of cosmetic applicator tool and container (100) are disclosed; where a triangular shaped cosmetic applicator tool (110) having a combination of rectilinear (225) and curvilinear sides (221,223), may be made of flexible material and may further comprise a tacky coating to adhere to a skin surface. Additionally, the cosmetic applicator tool and container (100) may include a storage housing (150) comprising a removable lid member (160) and a base member (170), where the base member (170) may facilitate affixing of the storage housing to a solid flat surface via providing a suction cup, and where the storage housing (150) may be configured to receive and store the cosmetic applicator tool (110) and suction cup.