The built-in ant-moat blocks crawling insects and the included Nectar-Guard tips on the feeding ports prevent bees, wasps, and other flying insects from contaminating the nectar The bright red covers attract hummers from a distance and remove easily so the bowl can be cleaned quickly and thoroughly. Polycarbonate construction enables us to offer our Lifetime Guarantee and an integrated wrap-around perch encourages the birds to sit and stay awhile.