Built-in thermostatic control automatically turns the heating element on and off when the temperature approaches freezing, keeping the 1-quart bowl’s contents unfrozen and drinkable. | Steel-sheathed electrical cord prevents fraying and keeps curious nibblers from damaging the cord, keeping your animals and your property safe. | Double-walled design makes it difficult for your pet to tip, spill, or otherwise upset the bowl, reducing the need for refilling. |