Even large containers have to be watered every day in GA. Many people have automatic sprinklers that drip their pots. If you don't, and you hand water, your pots will die if you leave town. This person's inexpensive travel solution seems like a good idea.
Irrigation spikes - attach these spikes to old soft drink bottles to create an efficient irrigation system for your garden! The slow-drip design delivers water deep into the soil, so your plants stay nourished while you save time watering.
Image as reminder of invisible water irrigation system for garden so that all the lovely plants we spend money on don't die within a few months... Do some research on environmental versions. This one is a Water Butt Irrigation System