I am no physicist but I just slapped a magnet onto my dogecoin Ballet and it did not stick.  Some stainless steel grades are magnetic and some aren't, I do know that but I thought it was aluminum.  Ahem.  I tried my best to bend the thing and could not without using excessive force so I guess you're right. 

The Ballet line of wallets are attractive I think, as is the packaging.  But when you're actually going to use a hardware wallet or just a slab of metal like the one sitting next to me it all comes down to the trust you have in the manufacturer since they're providing the private keys.  As far as I know Ballet has never been linked to any scam report, but still.  These are better as collectibles if that's your thing, and I would never feel comfortable storing a lot of funds on a Ballet.

They've been around for a few years AFAIK, yet there's never much discussion about them that I've seen.  Does anyone collect them?