A liquid infusion system has an infusion chamber with open top and bottom ends. The top end has a removable cover. Flavored ingredients are placed in the chamber. A lower housing is rotatably secured to the bottom end of the chamber. A one-way valve located within the lower housing allows liquid flow in only a single direction. A stopper configured to be inserted into a bottle of virgin liquid is connected to the lower housing. When the system is tilted downward, virgin liquid is free to flow from the bottle and into the chamber. Bringing the bottle to vertical closes the valve and allows the virgin liquid and any ingredients placed in the chamber to steep, to produce a flavored infused beverage. The lower housing can be rotated and locked into a position in relation to the infusion chamber to prevent the flow of liquid into or out of the chamber.