Abstract: A fluid bin assembly includes a bin having a floor with a side wall upstanding therefrom. The floor and the side wall bound a chamber. The floor has an opening extending therethrough that communicates with the chamber. A retention plate is removably mounted to the floor of the bin so as to at least partially cover the opening extending therethrough. The retention plate at least partially bounds a porthole that openly communicates with the chamber of the bin.

Abstract: A container system includes a substantially rigid container having a floor and a side wall upstanding therefrom. The side wall and floor bound a chamber. A magnetic mixer is disposed below the floor of the container. A mixing bag assembly is disposed within the chamber of the container. The mixing bag assembly includes a collapsible body having a first end and an opposing second end. The collapsible body bounds a compartment. A mixing dish is disposed at the second end of the collapsible body so as to communicate with the compartment thereof. A magnetic stir bar is disposed on the mixing dish.

Abstract: A method for mixing a solution includes positioning a collapsible container within a chamber of a substantially rigid tank. The collapsible container bounds a compartment. A mixer is disposed within the compartment of the container. Two or more components are fed into the compartment of the container. At least one of the components is a liquid. The mixer is raised and lowered within the compartment of the container so as to mix the components.