Echo Drops are small, delicate vials containing a luminescent blue liquid that shimmers with a faint inner light, reminiscent of the ethereal glow of the Echo. The vials are crafted from thin, clear glass with a slight curvature, topped with a silver or ornate metallic cap that features intricate engravings of celestial motifs. The liquid inside appears to pulse gently, as if alive, and the overall design exudes a sense of magic and mystery, fitting for an item that restores a character's ability to hear the Echo.