A cosmetic dispenser for axially moving a volume of cosmetic between an extended disposition and a retracted disposition with an elevator member, an innerbody with an open inner volume for receiving the elevator member, and a spiral member with an open inner volume for receiving a body portion of the innerbody in a relatively rotatable relationship. At least one protuberance, which can be inflexible, can project from a shoulder portion of the innerbody and can be axially aligned with a flexible wall segment of the spiral member thereby to produce a frictional drag between the innerbody and the spiral member. The flexible wall segment of the spiral member can comprise a proximally disposed skirt. Axial movement of the elevator member can be produced by opposed lugs that project from the elevator member through opposed longitudinal tracks in the innerbody and into engagement with opposed spiral threads on the spiral member.

 
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> System and method for flexible architecture for dermatologic treatments utilizing multiple light sources

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