The article delves into the advantages and practical implementation of using temporary, on-demand environments in Kubernetes, particularly for handling pull requests, as opposed to maintaining static test environments. By leveraging Kubernetes namespaces, developers can create and destroy preview environments dynamically, reducing maintenance costs and enhancing clarity through distinct naming strategies, such as context-URL-based or host-based approaches. The use of Kubernetes Ingress, specifically the Ambassador gateway, is highlighted for managing traffic within these environments. Codefresh pipelines are employed to automate the creation, updating, and deletion of these environments, with added flexibility for integrating verification steps like unit tests and notifications, ensuring efficient and rapid review processes. The article stresses the importance of managing preview environments to control cloud costs and suggests that deleting them once pull requests are closed is a cost-effective strategy. Overall, the shift to dynamic environments is presented as a significant improvement in resource allocation and workflow efficiency within Kubernetes.