Using ollas looks like a promising idea for saving water in the garden. I also like the idea that these would allow you to water less frequently (saving time) and weeding much less (also saving time). At this point in life, anything that saves time and money is a definite plus in my book!
I would use a real olla though, since I don’t like the idea of the silicone in my soil. Either that, or I will need to come up with a more natural alternative to it.