A method of forming a frozen beverage vessel, the vessel having a shell of desired thickness and transparency surrounding an interior volume, the method including: (i) providing a mould having an interior surface, the interior surface having a shape corresponding to a desired external surface shape of the shell； (ii) at least partially filling the mould with a liquid； (iii) refrigerating the at least partially filled mould； (iv) rotating the at least partially filled mould, whilst under refrigeration, about an axis of rotation such that unfrozen liquid flows over the interior surface of the mould； (v) varying the axis of rotation； and (vi) repeating steps (iv) and (v) under conditions and for a time sufficient to form the shell of desired thickness and transparency.
