A device for infusing flavor into liquids fits and seals to the neck of a bottle. The device has an infusing chamber that is selectively in fluid communication with the liquid in the bottle. The infusing chamber holds a replaceable infusing material that partially dissolves and infuses flavor as liquid passes over it. A check ball selectively separates the infusing chamber from the liquid in the bottle to prevent any infused liquid from returning to the bottle. The device has a passage for makeup air to enter the bottle as infused liquid is dispensed. The infusing material is replaceable by accessing the infusing chamber.