A disposable liner for use in a vessel used for blending chemicals is described. The liner has a body with an inside and an outside surface and at least one orifice for receiving and discharging a product contained in the body. The body has at least one layer of a flexible thermoplastic material that can be incinerated to dispose of liner. The liner is adapted to conform generally to at least a portion of the inner surface of the vessel when chemicals are present in the liner. The liner is insertable into the vessel and removable therefrom to dispose of the liner.