Compartment Insert for Threaded Receptacle

Abstract

A compartment insert to be used in conjunction with a receptacle, such as a water bottle, that when inserted between and coupled with, the receptacle and its cover or lid, creates an enclosed, water-tight inner chamber that protrudes into the receptacle itself, and is suitable for storing contents of various types (e.g. personal items, snacks, drink mix, pills, electronics) and for various purposes (e.g. accessibility, convenience, consolidation of loose items, concealment, protection from elements, protection from physical wear). A user of the invention is able to open the receptacle and access its contents by removing the compartment insert while leaving the lid intact on the compartment insert and its contents remain sealed. The contents inside the compartment insert can be accessed by removing the lid while leaving the compartment insert attached to the receptacle, sealing its contents inside.

1 . A compartment insert comprising:
 a. a cup-like primary compartment, and   b. a coupling on the upper end of the outer surface of the compartment that replicates the receptacle coupling in diameter, thickness, and thread dimensions, and   c. a protrusion that extends outwardly from the exterior surface of the compartment, below the coupling named in b above, and then downward such that it encircles the compartment itself and contains a second coupling on the inner surface of the downward protrusion that engages with the receptacle coupling.   
     
     
         2 . A compartment insert, such that when engaged with the coupling of a receptacle:
 a. fully seals the receptacle, and   b. forms an interior chamber that extends downward into the neck of said receptacle, and   c. is situated such that the majority of the compartment's inner volume is below the top of the receptacle.   
     
     
         3 . A compartment insert, such that when the compartment insert's coupling referred to in lb is engaged with the coupling of a receptacle's lid:
 a. forms a sealed compartment separate from that of the receptacle, and   b. allows the receptacle to be accessed by removing the sealed compartment insert without removing the lid and opening the compartment insert itself.