Aspects of the present disclosure may relate to a bag having a retractable lock unit that may simultaneously prevent theft of the bag and theft of its contents. The bag may include the retractable lock unit which can be secured to the bag, a zipper system having a pair of zippers, and a locking ring. In some aspects, a user may draw the lock unit from its housing to the pair of zippers and lock the pair of zippers together so as to prevent the bag from being opened. In this way, the bag may provide additional security for the contents while the user has the bag on their person or near themselves. In other aspects, the user may draw the lock unit from its housing around one or more objects before securing it to the locking point and/or a pair of zippers. In this way, the bag may be securely anchored to the one or more objects thus preventing theft of the bag itself as well as preventing theft of the contents.