Abstract: A flexible and twist-on clip for use with such as a blood vial or specimen tube. The clip includes a plasticized or other suitably constructed body defining an opening which reveals an inner perimeter sized to allow the clip to be twisted during application to the vial and so that the inner perimeter mates with and engages about a corresponding outer perimeter of the vial. Variants of the design may include an additional plurality of secondary apertures for providing additional elasticity to the clip body. Other variants can include outer configured protuberances to assist in exerting an anti-roll effect to the supported vial.