Autodesk, the University of Manitoba, and the University of Toronto have collaborated to develop a prototype of a finger-worn haptic feedback device called HydroRing. Unlike conventional haptic devices that are bulky and rigid, HydroRing provides a range of sensations including pressure, vibration, and temperature at the fingertip, enabling tactile feedback in mixed reality interactions. The device uses the flow of liquid through a thin flexible latex tube to transmit sensations. It can operate in both active and passive modes, with the passive mode minimizing interference and maintaining the user's flexibility and sensitivity. The researchers evaluated the device's ability to generate sensations and the user's perception of physical stimuli while wearing it, as well as exploring potential applications. The device allows for seamless switching between the physical and virtual worlds and provides a new channel for always-on notifications and information. However, there are challenges to overcome before liquid-based haptic feedback becomes a common solution, such as reducing interference and finding a better balance between new sensations and natural perception.