zokana: hi. you are right with the reflections and refractions from the background. but if i put it in to the glass there would be less white fresh places, i think. so i chose that way - made the background in photoshop and keep the white background settings from max 
I liked that feeling … like behind the mojito is some kind of discoclub or pub or something like that, so i chose this kind of background 
anyway… thanks for crit. and for all guys thanks for nice replies 

