The main difference betwween moulded and tubular vials are as follows,

? Molded vials produced by pouring molten glass into molds.

? Tubular vials produced by manipulating glass tube by hot edges. Since the tube is very precise, the vials come out precise.

Also, if we tell them in details. The definition should be.

Moulded vials are hot formed by injecting a ‘gob’ of molten glass into a mould, this gob is then pre-formed then blown out with compressed air to fill the mould, when cooled the mould is opened and the vial or bottle is removed.  Tubular vials are converted from long sections of glass tube known as cane, we use machinery to cut this cane into shorter lengths then manipulate the glass into vials or glass dropper pipettes.  Large glass melting companies such as Schott draw this tube from their furnaces and sell it to glass converters.  Moulded vials tend to be heavier and more durable, being intended for multi use or long term storage, tubular vials aregenerally used as laboratory disposals, i.e. one use only.  However tubular vials have their advantages as they are lighter to store and more tolerant of rapid temperature changes (particularly if made from neutral glass).