A frozen beverage device to convert a liquid beverage into a semi-frozen or frozen form has inner and outer walls forming at least one refrigerant cavity containing a refrigerant material with a freezing point below the freezing point of the liquid, the refrigerant material occupying at least 60% of the volume of the refrigerant cavity. The walls of the device can be squeezed to accelerate the heat transfer from the liquid to the refrigerant material； and the device may be placed in a squeezing apparatus. Where the device is to be disposable, the device can be placed in a flexible sheath or outer container before being squeezed to protect the device and/or insulate the user from the refrigerant material. A freezing spoon or stirrer can be used to assist, or accelerate, the freezing process.
