Freezable hydrogel offers a reusable alternative to ice cubes
When it comes to keeping things cold, ice cubes are hard to beat ... although the things do melt, never to be used again. Scientists have set about addressing that limitation, with reusable water-based "jelly ice cubes" that hold their shape at all temperatures.
https://newatlas.com/materials/reusable-jelly-ice-cubes/
