The first word that comes to my mind is "Awesome". The concept is cool and your technique is very good. It has a lot of detail, but nothing stands out too much so it´s easy to notice allmost everything If I had to critisize something, it would be the lower glass. I think that it lacks a bit depth. Also the water looks somehow non-natural. Other than that it´s very well done. I like the way you use shading to bring out the detail. Overall it´s an interesting piece of art with only a few flaws that keep it from reaching perfection
This is a beautiful piece, that needs a second or third look too really see the beauty in this. I am not someone who works well with charcoal since it is so messy, and is hard to work with. Though you have made it looks so simple, and easy to use in this piece. The texture you managed to work out in the water is stunning, and the little fish in the bottom glass with the dolphin diving into the bottom glass from the stream is simple astoundingly dynamic and beautiful. The concept is very original, and the composition is gorgeous! Very nicely done! ^^
GREAT concept and composition. The shapes of the glasses could use some work, and the bubbles in the glass could definitely be more spherical. The water doesn't seem to be flowing as natural as it could be---it's not perfect, it splatters, bubbles, churns, etc. The dolphin and top fish are pretty much perfect, the last fish could use a tad more shading and the water in general could use some attention---try to work some studies on water, it's movement, and reflective properties. It'll help. a lot. I've tried drawing glass before and can be super frustrating, but if you master it, it'll be all that more impressive.
Water is really one of the hardest things to draw properly, water and glass is very hard, water, glass and fish, well you are almost setting yourself up to fail from the start, but I do not think you did.
What you have here is a very stylistic drawing with really creative and original approach, if there was something Id want changed ( this is just my 2 cents ) it´s that the water seems very close to the edge of the mug so it makes the mug appear to have extremely thin glass, almost brittle. You got a cool drawing here.