: Liquid uses "keys" or tags to render dynamic content. For example, the render_liquid tag can be used to execute nested syntax within attribute values.

: Buttons and menus can "morph" or flow out of these liquid glass controls using navigation zoom transitions. Dataverse Liquid tags - Microsoft Learn

: Keys are used to reference trigger data in workflows for transactional messages and API broadcasts. 2. DIY Liquid "Shaker" Keychains

Recently, Apple introduced materials in AppKit and SwiftUI to elevate key interface controls.