I-conical flask inomzimba obanzi kodwa intamo encane, okunciphisa amathuba okuchitheka phakathi nale nqubo ebalulekile yokushwibeka. Lokhu kubaluleke kakhulu uma kukhona ama-asidi aqinile. Intamo ewumngcingo yenza i-conical flask ibe lula ukuyithatha, kuyilapho isisekelo esiyisicaba sivumela ukuthi ibekwe kunoma iyiphi indawo.