Supply your own spare tire to create a tip-proof outdoor feed or water receptacle for animals. The tire also can discourage animals from stepping in their feed or water. Made of tough, impact resistant, high-density polyethylene which protects against war page, stress cracks and UV damage. No sharp edges. Fits inside a 13 inch to 15 inch tire (not included). 16.44 inch diameter by 5.88 inch high, holds 10 quarts (2.5 gallons).