Abstract: A batch mixer and a reservoir lid. The batch mixer has a station for concentrate containers, a diluent source, a reservoir, a mixing tank, and a pump. The station has a container receiver and a concentrate outlet communicating with the receiver. The station delivers a predetermined volume of concentrate through the concentrate outlet. The diluent source has a diluent source outlet. The diluent source is actuable to supply an aloquot of diluent, having a predetermined proportionality to the concentrate volume, through the diluent source outlet at a predetermined rate of flow. The reservoir is disposed to receive the aloquot of diluent from the diluent source outlet. The reservoir has a volume less than the volume of the aloquot. The reservoir has an overflow reservoir outlet disposed to drain diluent in excess of the volume of the reservoir. The mixing tank is disposed to receive the diluent from the overflow reservoir outlet and to receive the concentrate from the concentrate outlet.

Abstract: A method and apparatus for mixing a containerized concentrate with diluent from a supply system. In the method, a container of concentrate is placed within a container station. The container is opened. A flowable portion of the concentrate from the container is drained into a mixing volume. A first portion of diluent is introduced into the mixing volume. A residual portion of the concentrate is washed from the container with a second portion of the diluent to produce a volume of wash diluent. The wash diluent is added to the mixing volume. The first and second portions of diluent have a total volume proportional to the total volume of concentrate. The draining is at least substantially completed prior to the washing. The apparatus has a mixing tank and a container that retains the container and delivers the concentrate, through a concentrate outlet, to a mixing tank. An opener is disposed to open the container within the container station.