A dip tube (10) for extracting a fluid (102) from a bottle (104) comprises an adapter (12) configured to be at least partially inserted into a neck (106) of the bottle (104) and being provided with a connecting port (38) which is configured to be connected to a suction device (118), an elongated hollow withdrawal tube (14) which has a cross-sectional area that is smaller than a cross-sectional area of the adapter (12) and which is configured to protrude from the adapter (12) into a fluid receiving space (108) of the bottle (104), when the adapter (12) is inserted in the bottle neck (106), and which is arranged in fluid communication with the connecting port (38) of the adapter (12), and a sealing disc (52) extending from an outer circumferential surface (54) of the withdrawal tube (14) and being configured to abut against an inner surface (128) of the bottle (104) so as to seal the fluid receiving space (108) of the bottle (104).
