Have You Heard About the Robots You Can Eat?

The robot is primarily made of gelatin. In addition, it contains citric acid (a defence against bacteria) and glycerol (which ensures hydration). According to a study published in Nature Materials, this combination did not dry out for more than a year, and the tentacle was able to bend and straighten over 330,000 times—only then did it begin to crack.

https://vtm.zive.cz/…/robot-kt…/sc-870-a-204425/default.aspx