Kubernetes is a powerful tool for managing data and applications. It's especially promising for managing data, but as with any new technology users need to take care to avoid some new pitfalls. In this talk we'll introduce 5 classic ways that users can lose data on Kubernetes and show how to avoid them. We've learned about them from our experience writing one of the most popular Kubernetes operators on GitHub as well as operating multiple data services over the last couple of decades. The dangers range from single copy catastrophes to fat fingers of fate. Forewarned is forearmed. This talk identifies the problems and helps ensure they don't happen to you.