The Perky-Pet Sierra Wild Bird and Finch Wild Bird Feeder holds 1.8 lb of seed or finch mix and features a plastic cap that protects the seeds from moisture. The six feeding stations with attached perches and seed ports can be easily switched from mixed seed to thistle seed. The clear, shatter-proof plastic reservoir makes it easy for you to monitor the seed levels. Remember to clean your plastic bird feeders once every two weeks with a mild soap and water solution.