What this artifact is due to? My solidify modifier thickness is very less. However, I am pretty confident this to be a modeling issue but cannot figure out the problem. White is the intended outline (rim light kind of) but that green thick highlight not what I want.

Here is the part file link. Thank you :) https://blend-exchange.giantcowfilms.com/b/8nJZnesg
Ok. So the reason was unnecessary solidify modifier I used. Removing it helped and after it was all about adjusting light coming through the bottle.