Patent ID: 7790211

Claim:
A package for preparing a refreshment, the package including a package space containing a gas and an at least a partly foamable liquid wherein the package is provided with at least one manually operable element with which a displacement of the gas and the liquid in the package can be effected such that foam formation occurs in the package space wherein the package space comprises at least two chambers mutually connected by a channel located there between, the liquid and the gas being displaceable between the at least two chambers via the channel, wherein the channel is associated with a fluid flow disturber for causing turbulence in fluid flowing between the at least two chambers, wherein each of the at least two chambers is configured for being varied by the at least one manually operable element at least as to shape, wherein the at least two chambers are each defined by a flexible wall, wherein alternating distortion of the flexible wall at least partially defining each of the at least two chambers, is configured to cause the liquid and gas to flow through the flow disturber to effect foam formation.