Cypress wood is rot resistant. In addition, these feeders are boiled in linseed oil for long life. Step design allows the feeder to be used with a 7/8" entrance as well as a 3/8" entrance. Cap is replacable. You can also use the feeder directly over your brood box on frames or inner cover as long as you surround the feeder with an empty hive body. Cap is included. You provide a quart mason or mayonnaise jar. These are also a great way to provide water for your bees.