Mixing device and mixing tap system

A mixing tap system, comprising:

• a tap with a tap base, a tap housing and a tap spout, wherein at least two fluidly separated inlet conduits are connected to the tap base, wherein a first inlet conduit of the at least two inlet conduits is configured to supply a drinking liquid to the tap base from a drinking liquid supplying device, and wherein a second inlet conduit of the at least two inlet conduits is configured to supply an additive liquid to the tap base from an additive liquid supplying device;
• a first operating member configured to operate a first valve positioned between the tap base and the drinking liquid supplying device and a second valve positioned between the tap base and the additive liquid supplying device for opening and closing the first valve or the second valve for delivering at least one of the drinking liquid or the additive liquid;
• wherein the tap spout comprises at least a first internal conduit and a second internal conduit running within the tap that are fluidly separated from each other for separately delivering the additive liquid and the drinking liquid;
• a mixing device within the tap spout, the mixing device comprising a first inlet connected to the first internal conduit and configured to receive the drinking liquid and a second inlet connected to the second internal conduit and configured to receive the additive liquid;
• a tap outlet, wherein the first inlet and the second inlet are adapted to deliver the drinking liquid and the additive liquid separately at the same time such that the drinking liquid and the additive liquid mix at the tap outlet;
• wherein the mixing device is arranged in the vicinity of the tap outlet;
• wherein the first internal conduit and the second internal conduit are flexible and run from the tap base through the tap to the mixing device in a concentric manner;
• wherein the first internal conduit is inside the second internal conduit;
• and
• wherein the first internal conduit is fixed with respect to the spout and terminates at a tip of the spout with a nozzle.