Iglasi Yokusela Uyilo loluthotho lweeglasi zeTube luphefumlelwe yiglasi ye-borosilicate, eyaziwa ngeempawu zayo zezinto eziyenziwayo. Ingqokelela iquka isakhiwo seendonga ezimbini, esikhumbuza ityhubhu yovavanyo edadayo ngaphakathi kwenkxaso yangaphandle ecacileyo. Iglasi eseseko esicaba ifumaneka ngobukhulu obuthathu obunokubekwa phezu kwelinye, ilungele iziselo ezishushu okanye ezibandayo. Isixhobo esisetyenzisiweyo sivumela iimilo nemibala eyahlukeneyo, kwaye iiglasi zenzelwe ukulungela ukusetyenziswa kwaye zikhuselekile xa zihlanjwa ngomatshini wokuhlamba izitya. Ipakeji yenziwe ngekhadibhodi ephinda yasetyenziswa, igxininisa ukuzinza.