The Return to Sender Vigor is a distinctive, Art Deco-inspired bottle with a sleek, curved design, featuring intricate metallic filigree and glowing blue liquid contents. The bottle's surface is smooth and polished, with engraved patterns that reflect the steampunk aesthetic, and a sturdy, ornate cap that seals the potent liquid inside. The glow from the liquid casts a soft, luminous aura, highlighting the bottle's detailed craftsmanship and the Vigor's magical properties.