The only safety concern I'd have is dependent upon the toxicity of the thermodynamic material and the durability of the stainless steel encasement. If there are

The only safety concern I'd have is dependent upon the toxicity of the thermodynamic material and the durability of the stainless steel encasement. If there are any concerns about ingestion of the material, they should do some testing to be sure. I used to run a test lab, and we'd cycle medical products through hundreds of autoclave cycles to test their durability to sterilization. Some sort of heat and moisture cycling would be a good idea. Also, the photo of the metallic bean pile could use a coffee cup next to it to show scale. I saw that and thought, what if I swallowed one or choked or on it? It wasn't until I scrolled down that I saw the size of the bean.