A frozen beverage device has a container and sealable cover to convert a liquid, such as a non-alcoholic or alcoholic beverage into an at least semi-frozen slurry containing ice crystals. Freezing devices, which may have a range of shapes, contain refrigerant to form a thin layer of ice/ice crystals on the deformable walls of the freezing devices, the ice crystals being released therefrom due to agitation of the liquid by shaking/rotation and/or squeezing on the container and/or cover.
