STAYbowl prevents guinea pigs and other small pets from tipping their food bowls, saving owners valuable time and money. As a result, it very quickly pays for itself. STAYbowl has a simple, ergonomic design that makes sure small pets get just the right amount of food they need without over- or under-feeding.Most vets recommend only 1/8 cup (2 TBL) of kibble/day for each adult guinea pig (plus unlimited hay and water, and some fresh veggies), so we recommend measuring dry food. Dishwasher safe.