This is a Slime shader material. You can adjust the refraction of the material, as well as the noise, view displacement, and transparency.

You can also add a complementary rim light to make the colors of your object pop.

Of course, you can connect textures (albedo and normal) to enhance the quality of your object, along with the basic PBR parameters like smoothness, metallic, or color with HDR.

Place objects inside others that use this material, and they will appear distorted—like something trapped in ice, for example.

Enhance the visual quality of your project with this kind of material!