The dissolvable spy paper sells in packs of 32 for $9.00 each. It’s made from a special material that turns into an unreadable mulch once it comes into contact with any type of liquid. This disappearing act takes place in a matter of seconds, leaving your state secrets unknown for yet another day. The paper behaves as you’d expect it to, perfect for drawing up legal documents with super villains with super-villians. It is available in packs from Amazon, with prices starting at $10.99.”]
Source: https://gizmodo.com/dissolvable-spy-paper-keeps-your-secrets-safe-196104