Design Concept: Create a vibrant retro pop art mural featuring a stylized cityscape. Use bold outlines to define buildings and elements within the scene.

Color Palette: Incorporate bright colors such as electric blue, vivid yellow, and hot pink, with light orange accents to add warmth and contrast.

Text Element: Feature the word "UNCONTAINED" prominently in a comic book font, using a contrasting color like white or black to ensure it stands out against the colorful background.

Additional Elements: Include playful elements like speech bubbles or comic-style action words (e.g., "WOW!" or "BAM!") scattered throughout the design to enhance the pop art theme.

Texture and Finish: Consider using a matte finish for the background with glossy accents on the text and key features to create visual interest and depth.

Placement: Position the cityscape at the bottom of the container, allowing the "UNCONTAINED" text to dominate the upper section, drawing the eye upward.

Lighting Considerations: Use strategic lighting to highlight the vibrant colors and textures, making the container visually striking both day and night.