i don’t know what to do here so
here’s blender in blender
the “mango juice“ could be better though
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use cycles 
I use Cycles there! That’s how I get the transparent glass in the first place.
s/I use/I’ve used/
huh thats weird - the lighting on the blender’s glass doesn’t look as good as expected
IIRC that glass is actually not hollow; back then I don’t know how to “solidify” a prism
I just make the glass translucent with a tint of white with very low IOR so that it looks somewhat decent
i asked a blender expert and they said
I'm really not sure why the blender looks like that, I can only assume they are using the alpha input of the principled shader which shouldn't be used for glass (it's not realistic)