The plant toilet was an idea I had after searching for an old sink to use in the greenhouse for potting and watering plants. Even second-hand, a sink was going to cost at least $40, so we picked up a bowl from Value Village, drilled a hole in it and set it in place. Now it serves as the perfect place to repot plants without allowing water and dirt to fall to the floor in the greenhouse. I suppose you could reuse the water if you wanted to, but to prevent pests from being transferred between plants, we don't suggest it. Either way, it's adorable and my favourite part of the greenhouse!