According to our testing, Aimicat’s waste compartment can hold up to 7.2 kg of cat waste for 7 days. It also depends on how well cat litter absorbs urine. If it absorbs less urine and less feces, the container can hold more waste. In general, the fecal volume of a cat is proportional to its weight. So, if a cat is 6.5-7.5 kg, it will produce 112ml of urine every day, about 0.78 liters of urine every week. In this case, Aimicat would hold about 0.9kg of cat litter each week.