The wide rubber-edged non-skid base on these ProSelect X-Super Heavy Non-Tip Bowls are designed to prevent movement and spillage during feeding. . Extra heavy-duty stainless-steel construction. Won’t rust or scratch. Lifetime . Material : 14 4 Stainless-Steel (14% Chrome 4% Nickel); Rubber base.. Capacity : 8 oz.Gauge : 0.6mm