Regarding stretchable materials, gallium-based eutectic liquid metal (LM) alloys have shown broad prospects for flexible and stretchable electronics where system architecture requires bending, rolling, folding, twisting, stretching, and conforming onto irregular shapes. As its name suggests, LM remains in the liquid phase at or even below room temperature (based on the composition). Aside from their excellent liquidity, gallium eutectic LMs are also highly electrically and thermally conductive, with very low vapor pressure, low toxicity, and good biocompatibility. [4,5] As of these excellent properties, LMs found diverse applications, such as proximity sensors, [6] sensors for strain, [7,8] temperature, [9][10][11] and acceleration, [10] and other flexible sensors, [12] flexible antennas, [8,12] self-healing interconnects, [13] stretchable wireless power transfer devices, [14] stretchable electromagnetic actuators, [15] stretchable loudspeakers, [16] stretchable interconnects, wires and electronic components, [17,18] devices to integrate light-emitting diodes (LEDs), [10,19] printed diodes and transistors, [17] flexible display devices, [20] flexible solar cells, [21] heat dissipation devices, [22] stretchable thermoelectric generators, [23] e-skin, [24] wearable electronics and biological prosthetic devices, [9,11] wireless monitoring, [25] health monitoring, [6,18] eye-movement tracking, [26] neural microelectrode array, [27] and implantable and epidermal electronics. [27,28]