"I found this concept interesting when it was posted on Yanko Design last month. The video in their article contains English text that cover some of the questions that were posed. Here is the link to the Yanko post: https://www.yankodesign.com/2019/03/26/this-flower-vase-is-also-a-fire-extinguisher/1. The bottle is made of rigid PVC according to the video. 2. Discreet and on the counter is better than buried in a cabinet and covered in safety labels. 3. The intent is that the homeowner would be the user of the vase or that the design would be iconic enough that it would be recognizable by others. 4. In my opinion, the text on the bottle of "Firevase" is clear enough to indicate the products use. "