It is a heavy glass vase I got from Old Time Pottery I inverted on some concrete blocks so they could swim in from the bottom. You have to get wet to submerge the vase and turn it up under water so the vacuum created keeps the water inside. Make sure you have a heavy glass container or the weight of the water will shatter it. (court. of Rick Brown's fb page - Riverview Flower Farm Growing Florida Friendly Plants)
Trombe - Internal photo of a dining room extension in London. It incorporates a structurally glazed roof supported on laminated glass fins and beams. The extension has minimal frame sliding doors to maximise the views to a picturesque garden. The glass has heat mirror technology to provide a comfortable internal environment.