I purchased the barrel stool in bronze to use on my patio. It excellent in size, design and construction. The bottom of the stool is open, as in not metal, allowing it to be hollow. They have covered the bottom with a lightweight rubber fabric, which I don't know if it is waterproof, so I just make sure to store the stool from the elements or sprinklers. Otherwise, it was a great purchase; I'm very pleased with it.