A water-filled garden roller is a landscaping tool used to flatten and smooth the surface of lawns and newly seeded areas. The roller is filled with water, which adds weight, making it more effective for pressing down soil and grass. It is particularly useful for ensuring good seed-to-soil contact after sowing grass seed or for leveling uneven ground. The water-filled design allows for easy storage, as the roller can be drained when not in use. Typically made of durable materials such as steel, the roller is easy to push or pull across the lawn, helping to create a smooth, even surface for a well-maintained garden.