Patent ID: 7097075

Claim:
A device, comprising a first and a second film, a dispensing zone, a first chamber, containing a first substance, and a second chamber, containing a second substance, the chambers being connectable to each other via a transition zone that is selectively openable, at least one of the films being thermoformed in an area of the chambers, and at least one of the films having a portion which is deformable in an area of the second chamber in such a way that, after activation of the device, with the transition zone being opened, the first substance is transferable substantially completely into the second chamber, with an increase in volume of said second chamber, without any appreciable flowing back of a mixture into the first chamber occurring; wherein, said deformable portion comprises a portion of said film which is preformed into a first surface configuration which provides a first volume for said second chamber, and is substantially non-reversibly deformable in response to pressure applied to an interior of the second chamber, to assume a second surface configuration which provides ea second volume for said second chamber, which is greater than said first volume.