The Observer Window Feeder's open, clear construction allows for unobstructed and up close views of birds as they feed. This feeder attaches securely to a window using 3 suction cups. It is constructed of a sturdy polycarbonate plastic that stands up to the elements and won't yellow with age. The 7 inch dish is suitable for offering seed, fruit, mealworms, or suet. The tapered overhanging cover deflects weather and keeps large birds out. Backed by the Droll Yankees Lifetime Warranty against Squirrel Damage and proudly made in the USA.