It might be tempting to leave your float in the water overnight because if you put them next to the water they might blow away. However, keeping them in the water for longer periods of time will shorten their lifespan. Being exposed to direct sunlight while not in use will fade the patterns or colors on the surface, and the chemicals in the water will break down the plastics over time. We recommend that when you are done using them that you bring them inside away from the sun and the water.