Compartmentalized container cap

Abstract

A compartment cap for use with a container, a container assembly, and a method for mixing at least two substances is disclosed. The compartment cap keeps one of the substances separated from the other substance until a user so desires to mix the at least two substances together, either entirely or in partial amounts. The compartment cap is designed such that it removably couples with the container. A top cap is further included that is capable of coupling to both the compartment cap and the container so that the compartment cap can be discarded when it is no longer keeping the retained substance separate from the container.

What is claimed is: 
     
         1 . A compartment cap for use with a container, the compartment cap comprising:
 a main body including an upper portion, an intermediate portion, and a bottom portion,   the main body defining a cavity configured to receive a first substance,   the upper portion comprising external threading and configured to removably couple to a top cap, and   the intermediate portion comprising internal threading and configured to removably couple to the container.   
     
     
         2 . The compartment cap of  claim 1 , wherein the intermediate portion projects downwardly, with the intermediate portion and the bottom portion defining a cavity therebetween for receiving a neck portion of the container. 
     
     
         3 . The compartment cap of  claim 1 , wherein the intermediate portion is disposed between the upper portion and the bottom portion. 
     
     
         4 . The compartment cap of  claim 1 , wherein the upper portion and the bottom portion of the main body define the cavity. 
     
     
         5 . A container assembly for mixing a first substance and a second substance, the assembly comprising:
 a container configured to receive the second substance;   a top cap comprising internal threading; and   a compartment cap comprising: a main body including an upper portion, an intermediate portion, and a bottom portion, the main body defining a cavity configured to receive the first substance, the upper portion comprising external threading and removably coupled to the top cap, and the intermediate portion comprising internal threading and removably coupled to the container.   
     
     
         6 . The container assembly of  claim 5 , wherein the intermediate portion projects downwardly, with the intermediate portion and the bottom portion defining a cavity therebetween that receives a neck portion of the container. 
     
     
         7 . The container assembly of  claim 5 , wherein the bottom portion of the compartment cap is configured to at least partially extend into the container. 
     
     
         8 . The container assembly of  claim 5 , wherein the container comprises external threading, and the internal threading of the top cap is configured to removably couple with the external threading of the container. 
     
     
         9 . The container assembly of  claim 8 , wherein the external threading of the container is substantially the same as the external threading of the upper portion of the compartment cap. 
     
     
         10 . The container assembly of  claim 8 , wherein the internal threading of the top cap is substantially the same as the internal threading of the intermediate portion of the compartment cap. 
     
     
         11 . A method of mixing a first substance and a second substance, the method comprising the steps of:
 providing a container;   providing a top cap comprising internal threading;   providing a compartment cap comprising: a main body including an upper portion, an intermediate portion, and a bottom portion, the main body defining a cavity, the upper portion comprising external threading and removably coupled to the top cap, and the intermediate portion comprising internal threading and removably coupled to the container;   receiving the first substance in the cavity of the compartment cap;   receiving the second substance in the container;   detaching the compartment cap from the container;   detaching the top cap from the compartment cap;   pouring the first substance into the container;   coupling the top cap to the container; and   shaking the container to mix the first substance and the second substance.