A filament lamp set in a drink bottle is provided, including a light emitting unit, wherein the outer side of the light emitting unit is sleeved by a connecting mechanism which can be fixedly connected with the mouth of a bottle body; an opening is formed in at least one end of the connecting mechanism; the light emitting unit extends out from the opening. The bottle body adopts the common drink bottle, by which the connecting mechanism can be matched with the mouth of the bottle so as to fix the bottle body in the connecting mechanism. In addition, the light emitting unit is sleeved by the bottle body. Based on the decorative patterns, colors and the like on the bottle body, different effects can be achieved by the emitted light and faculae, thus achieving the purpose of decoration.