I have acquired many vases and bowls over the years. Recently saw good reuse of these objects on Pinterest. Making birdbaths and bird feeders makes sense. E-60000 adhesive days clear and is extremely durable. Simply stack and layer to your own liking. Making sure as you build that balance and sizes of found items all work together. Remember...these will be outside so put them somewhere safe. Not around rambunctious puppies, small children or galloping ponies. My plan is to place mine around the flower beds around the house. If they tip. They will land on soft soil. So go ahead get out your boxes of vases and bowls, platters and get a tube of E-6000 . The birds will love you for them. . If you live in colder climates..youll need to store them somewhere safe in below freezing temps.