The present invention relates generally to a cosmetic apparatus. More particularly, the invention encompasses an accessory sleeve for a cosmetic item. The present invention is also directed to a novel lock-in cosmetic accessory sleeve. The accessory sleeve has a first opening to securely and releaseably accommodate a first cosmetic container, and a second opening to securely and releaseably accommodate a second cosmetic container. Both the accessory sleeve and the containers have releaseable engagement means to securely hold each to the other.