Ƙaƙƙarfan ƙugiya na vials an yi shi da aluminum don crimping da sealing; filastik (polyethylene, polypropylene ko resin phenolic) don rashin lalacewa da rufewa. Gaskat ɗin hula wani abu ne na septum wanda allurar sirinji ta soke shi don fitar da samfur daga cikin vial. Taswirar hular rigar tana da gyare-gyare iri-iri kuma an yi ta da abubuwa daban-daban.