Give those used plastic bottles a new lease on life as plant holders and reduce the amount of single-use plastic headed to landfill (or into our oceans). By simply cutting a plastic bottle in half, decorating it (optional) and filling it with soil, it's ready to go as an upcycled garden pot. Ideal for indoor plants or you can create a hanging garden by attaching them to a wall. Take it one step further and create a community garden inspired by The Green Wall Project.