Vial rack, yomwe imadziwikanso kuti chosungira kapena thireyi ya vial, ndi chipangizo kapena chowonjezera chomwe chimagwiritsidwa ntchito m'ma laboratories ndi zoikamo zasayansi kuti agwire ndikulinganiza Mbale mwadongosolo. Amapangidwa kuti azigwira motetezeka Mbale zingapo nthawi imodzi, kupereka bata ndi kumasuka panthawi yosamalira zitsanzo, kusungirako, ndi mayendedwe.
Zoyikamo mbale zimabwera mosiyanasiyana, makulidwe, ndi zida kuti zigwirizane ndi mitundu yosiyanasiyana ya mbale. Nthawi zambiri amakhala ndi chimango kapena mawonekedwe okhala ndi mipata, zipinda, kapena mabowo momwe mabotolo amatha kuyikapo kapena kuyika. Mipata kapena zipinda ndi zazikulu ndi zoumbidwa kuti zigwirizane ndi mbale, kuonetsetsa kuti zizikhala zotetezeka.