Balcony box coasters serve much more than a purely decorative function. As with plant pot saucers, their main function is to catch excess water. Your plants benefit from this because the water remains available to them, and the soil in the balcony box also remains evenly moist for a longer period of time and does not dry out as quickly. You benefit as well because you have to water less often, even on sunny days. Our tip: better remove during persistent rain to avoid waterlogging. Also made of galvanized steel, our balcony box saucer is matched in format to the balcony box from our range.