Can you make a cryptex?

In the realm of cryptography and digital currencies, the term "cryptex" often conjures images of ancient devices from fiction that conceal secrets within their intricate mechanisms. However, in the modern context of cryptocurrency and finance, we typically rely on mathematical algorithms and cryptographic principles to secure our digital assets. So, my question is: Can you actually create a physical cryptex in the modern sense, one that utilizes modern cryptography to safeguard valuable digital information, such as private keys for cryptocurrencies? If so, what materials and technologies would be required, and how would the cryptex work in practice?