In a liquid dispensing system having a plurality of dispensing heads, means for connecting each head to an individual bottle of liquid, a pour spout on each head, a battery in each head, means in each head for providing electronic dispensing data, and a remote data center for receiving and recording the data, the dispensing head improvement comprising:
- a) a normally open liquid valve in each head;
- b) permanent magnetic means for magnetically holding the valve open during inversion of the bottle and head to a pouring position;
- and
- c) electronic means for electrically neutralizing said permanent magnetic means for releasing said valve and effecting valve closing while the bottle and head are pouring, to terminate dispensing.