This feeder has at the base a unique access port in the base that allows the feeder to be filled with ease. It is advisable to fill the feeder over a container such as a box or bucket so that - in the event of spillage - food can be easily retrieved. The secondary metal cage is designed to keep Squirrels and larger birds from the Peanuts. Easy to fill & maintain and will provide hours of enjoyment as you watch the birds feed. It is always recommended you feed whole peanuts from a peanut feeder as it has been know for fledglings & small birds to choke on whole peanuts. A peanut feeder ensures that the birds can only eat a small piece of the nut at a time.