Containers are designed to be ephemeral, but the applications they power often rely on persistent, business-critical data. This session explores how to successfully run stateful workloads in Kubernetes without compromising reliability, performance, or data integrity. Through real-world architectures and live demonstrations, attendees will learn how Kubernetes manages persistent storage using Persistent Volumes, Persistent Volume Claims, StorageClasses, and CSI drivers, along with best practices for deploying databases, message brokers, and AI vector stores. The talk also covers backup and disaster recovery with Velero, high availability patterns, storage performance optimization, and production considerations on cloud platforms. Whether you're modernizing legacy applications or building cloud-native AI platforms, this session will equip you with practical strategies to ensure that while containers may come and go, your data remains secure, resilient, and always available.