Abstract: A method for preparing a foamed beverage, the method comprising locating a milk-based substance in a holding container or foamer having at least one flexible wall portion and a closure to secure the milk-based substance in the holding container, the closure defining a spout, a tubular member in fluid communication with the milk-based substance and the spout, and at least one mixing chamber disposed between the spout and tubular member in which the milk-based substance and air can be mixed to form a dispersion; handling the holding container with milk-based substance therein and positioning same such that the spout is directed towards an open end of a drinking receptacle; and compressing, manually, the at least one flexible wall portion so as to increase air pressure within the holding container and actuate flow of milk-based substance and air located in the holding container via the tubular member to the mixing chamber to produce a milk-based substance and air dispersion, which upon further compression of the

Abstract: The invention provides a mixing device which defines a mixing chamber having two inlets leading into the mixing chamber at angularly spaced positions. The device further includes an outlet leading from the mixing chamber. The mixing chamber is typically generally spherical in shape with the outlet being positioned diametrically opposite one of the inlets. The invention further provides a nuclear power plant having a core conditioning system including a pair of heat exchangers, namely a recuperator and a water cooled heat exchanger. The recuperator has a hot side and a cold side and the plant includes a mixing device positioned upstream of the inlet on the hot side of the recuperator to permit the temperature of gas being fed to the recuperator to be restricted to a predetermined maximum by mixing hot and cold gas in the mixing device prior to feeding the mixture into the hot side of the recuperator.