Do you want to ask, "Can sponges float on water? What about flower pots?" The former can float on the water, but the latter cannot.
1. Sponges are composed of many tiny gaps that can accommodate water molecules. When a sponge is immersed in water, the attraction of water molecules draws the water molecules into the gaps in the sponge, making the sponge heavier but maintaining the same volume. Since the buoyancy of water is related to density, when the density of the sponge is greater than the density of water, the sponge can float on the water.
2. Flowerpots are different. They are made of solid materials. The density of flowerpots is much greater than that of water, so they cannot float on the water. If you place a flowerpot on water, it will sink.