Meijer offers the Flowerhouse Solar RainMaker Water Irrigation System
. With free shipping
, that's the lowest total price we could find by $15, although most merchants charge $75 or more for similar devices. Sales tax is added where applicable. This uses both rainwater and solar power (along with three AA batteries, which aren't included) to water plants every three hours. It includes 45 feet of hose, 12 drips, 12 stakes, 12 tees, and more.