Indoor plants bring a home to life and are important because they purify air. Since plants need sunlight they are often placed behind windows. These windows let the sunlight through but block the rain. Rainwater contains more oxygen for plants then filtered tap water. Since not all homes have a garden to collect rainwater, mostly tap water is used for indoor plants. During rainfall rainwater drips down many windows, not able to reach the plants displayed behind them. Therefore this window collects raindrops from the nature outside to pass through to the nature inside.