WoofiGo stainless steel top entry litter box grows with your cat, providing lasting comfort from kittenhood to adulthood—no replacements needed for 3-5 years. Although WoofiGo stainless steel top entry litter box have a higher initial cost, they can last for 3-5 years, saving you the cost of replacement 3-5 times. In the long run, investing in WoofiGo top entry litter box stainless steel is a wise choice