Beverage containers and coolants therefore

A device for holding and cooling a beverage comprising a beverage container having an opening that permits the emptying of the beverage from the container, a coolant capsule within said container, said cooling capsule containing a cooling medium able to retain a cooling environment to cool the beverage and wherein said beverage container has a removable opening providing an orifice to permit beverage to be emptied and said capsule is dimensioned such that said capsule is larger than the opening but has surface characteristics which permit the beverage within the container to bypass the capsule and permit the liquid contents of the beverage container to exit the opening, wherein the capsule includes at least one internal channel which conveys the liquid content of the beverage through the capsule, from one side of the capsule to another side of the capsule.