Triangle in the bottle

[Fencer]

hi everone,
as you can see in the image there appears an triangle in my bottle.
Does anyone know where it comes from and how I can get rid of it.

thanks for your answers and hints

Greetings Fencer



Btw: I doublechecked the model so I think it is as it schould be.
Ps: when rendering Indigo says something about "degenerated triangle" but i've removed all double vertices

[Wedge]

Possibly a verticle has been pulled to the wrong side of the glass? (assuming it has thickness)

You can also try checking the normals or recalculating them.

To me it looks like a mesh error.

[Fencer]

ok thank you I'll go over it third time