Problem creating specific glass


I want to create this type of glass where it appears to be very dark/blackish, but I don’t know which settings to use or materials as a starter. It will be really helpful if someone knows how to achieve this.

Here is the material:

If you can’t see the liquid, I would just use a black principled with slightly above 0.5 specular. I can see through, then refraction with color and glossy mixed with fresnel. Alternatively white glass shader with dark absorption.

Thank you! I will try it. I also don’t know how to add a PNG or another transparent material on top of the glass. The final effect I’m looking for is this:

The text doesn’t look transparent though, the shading going on behind it doesn’t show through.