The bottoms of these open and the next smaller size vase slides out. Really unique. They are a little light and I usually put sand in the bottoms so the cats won't knock them over (typically light metal) and I couldn't do that because of the hinged bottom. No problem! I can either use a small bag for sand of a brick (you don't know my cats). The colors are beautiful and I really like them. I thought metal didn't sound like something I wanted indoor and the price is usually very high. Those days are long gone-these vases are a wonderful addition to add texture and color to any decor and any problems will be handled courteously and quickly by Overstock.