Are you using two spotlights, or is that a lightbulb I see in the reflection? I don’t like the lighting at all. Do you know what three point lighting is? It’s not the best for all renders, but it’s a great place to start with almost any render.
3 pt. Lighting is very simple and easy to learn. Basically you have A)spotlight in front of subjects. B) a fill light off to the side to lessen hard shadows. C) a backlight which is softer and is used to fill any unsightly areas behind the subjects.
Just google it and you’ll find lots of info. Position your lights in the normal 3 point stance, then work with your lighting from there to achieve the look you want. That’s how they do it in real life studios and on location. You may add more lighting or even remove a light based on your needs. But I’ve found it’s good to start with the 3 point lighting, because at least you’ll start out with a decent render, and that’s always a good starting point.
Obviously with hard shadows, you’d have to remove the back light. And the fill light moves based on what you’re shooting, and the angle of the camera, textures, etc.
I think the modelling is excellent, it’s def. the lighting. Though not sure if it’s specularity on your glass materials or the lights too bright, but the white spots are too hard. Real glass emits just a glimmer. Just that little bit that makes your head turn. Look at the base of the wine glass. Now that’s what I’m talking about.