The crux of the new Liquid Glass design is that the “material” (an odd choice of words from Apple to describe something that’s purely digital) used for the background to menus, and out of which icons are “crafted”, behaves like glass would in the real world, if it also flowed like a liquid.

For the first time we’re introducing a universal design across our platforms.” With those words, Alan Dye, Apple’s VP of human interface design, marked a turning point at WWDC 2025, as Apple unveiled its broadest design update,

Apple announced a refreshed user interface called Liquid Glass, which features a transparent visual interface that gives everything a "glassy" look.