Watering balls are glass globes that self water plants over an extended period of time. Beautiful, functional watering balls are designed to release water to drying soil. Great for vacation time. 
To use: after watering your plant thoroughly, use a pencil or other tool to start a hole in the soil for the watering ball. Fill the watering ball and, holding your thumb over the opening, invert the watering ball and insert in the soil. Water will be drawn from the ball as plant soil dries, keeping your plant happy!