Not as elegant as our Glass Globe version and doesn't give out as much water; but, this one costs less than half as much and can really help your plants. Depending on temperature, potting mix and plant type; it typically goes about 5 days before needing to be filled up again. 

These water slowly and the slower you water, the deeper the water goes, the deeper the roots go, and  the more access plants have to moisture and nutrients. The stronger and more healthy they become and the more resistant to under-watering, over-watering, and to pests.