Congratulations! I have a similar idea, but more for refilling a particular glass or mug with a given beverage before it becomes empty (because reaching the end makes me feel sad now and then :P).
The scale is a lot smaller :P : imagine a single-cup coffee machine with a scale where the cup sits all at your desk. If you remove the brewing functionality with a desktop-sized tank and a dispenser system, then you have something that would work for any beverage. There is no delivery beyond what the appliance would provide (tank to cup). My other inspiration for this idea was the Norse myth of Thor and drinking horn connected to the sea [0].
