US Patent 7377383 Multi-chamber container for mixing ingredients at time of use

A mixing container wherein two or more chamber members each contain a material to be mixed. A first chamber member has a threaded port. A second chamber member has a threaded neck which is threadedly receivable in the port to threadedly connect the chamber members. The neck has a terminal opening. A sealing member covers the opening. The first chamber member has a frangible portion which sealingly closes an inner end of the port and which is broken is as the neck bears there against as the neck is threadedly received in the port. A blade on the first chamber member punctures the neck sealing member as the neck sealing member bears against the blade as the neck is threadedly received in the port. This allows the materials in the chamber members to flow between the chamber members to be mixed. The container may also have an opening for dispensing the substance mixed therein.