Twist Top: The Twist Lock Top keeps seeds dry and away from squirrels. These feeders give birds plenty of room to live and eat. Easy to fill and clean: It is easy to fill, clean and use. This bird feeder will please all birds. Waterproof: This waterproof bird feeder can achieve balanced feeding in six directions. Wide domed top to keep birds and seed dry while they feed, includes swing opening in top for easy food addition.