Bubblewrap is a setuid implementation of a subset of user namespaces that enables running unprivileged containers without requiring root privileges. The tool provides a secure alternative to traditional container runtimes by implementing namespace isolation while maintaining a reduced attack surface. Unlike full container solutions, Bubblewrap does not provide control over iptables, focusing instead on process and filesystem isolation. The implementation uses setuid capabilities to create sandboxed environments where applications can run with limited system access. This approach allows for containerization without the complexity and potential security risks associated with full-featured container platforms. Bubblewrap is designed as a lightweight solution for scenarios where basic container isolation is needed without the overhead of complete container orchestration systems.