It's a specialized type of growing pot with soil above, water below and an air gap between them. The air gap supercharges the plants and you get dwc type growth in soil if the other parts of your grow are on point.I have not tried these, are they something like a grow box?
Here are some links if you want to explore:
Buds Buddy's SIP vs others
Shows the dramatic difference plant size from non-sip plants in Buds's last grow. He got over a pound from that 5 gallon bucket.
Buds Current Grow
We're having a bit of background discussion on them in this second link; how they work, how to build them, etc. There are a few of us growing with them and comment on them in our respective threads, but most of the discussion is happening in Buds'. The commercial c erosion is pictured below, but I've built diy versions.
Factory Pics from the Website.