An eyelash extension case includes an enclosure body defining an internal region for storage of one or more eyelash extensions, and a lid operative to cover the internal region in a closed state and open to allow access to the internal region in an open state. Internal wall surfaces of the internal region form a floor, and one or more eyelash extension retaining features. Each eyelash extension retaining feature includes a protrusion that extends outward from the floor toward the lid along an axis. Each protrusion has curved wall surfaces that transition into the floor, and each protrusion further has curved wall surfaces that define an outer profile of the protrusion surrounding the axis. At least a portion of each protrusion is formed from a self-adhesive super-gel material that is relatively sticky to retain one or more eyelash extensions.