Looks good but I have 3 things which might improve this:
1. the bubbles... looks like you used some glasslike structure for them, another structure might work better. They are a bit too dominant ATM.
2. you forgot the metal rim around the hole where the plug comes from
3. maybe the perspective is a bit to strong, it shows f.i. on the tiles

I allways thought that pulling the plug was related to medical terms - like shutting down life support.
Nice how easy reflections are, in Max.

This isnt Max

That's amazing! Love the details.