This water jug carries its name for a reason: it comes with a coolant stick at its core that keeps fluids cool for up to two hours after they come out of the refrigerator. The coolant stick is stored in your freezer until you’re ready to serve water or any other of your favorite beverages like orange juice, and it gets fastened to the lid in one easy turn. But the coolant stick is not the only cooling agent – the 1l COOL water jug is made from double wall borosilicate glass which also has excellent insulating qualities. It is dishwasher safe.