Apparatuses and methods based thereon are provided for mixing utilizing mixer inserts. A mixer insert may comprise an enclosing component adapted for application to an opening in a container to which the mixer insert is applied, to enclose a space in the container. The mixer insert may further comprise one or more mixing components, adapted to fit within the enclosed space when the enclosing component is applied to the opening in the container, with the one or more mixing components being configured to mix material placed within the enclosed space when the combination of the container and the mixer insert is subject to particular force or movement.