Thank you guys. GGeek gave me quite good idea... to make a BNG Energy ad poster.

@Hybrid Divide: Ha, good thing you asked. Yesterday I tried basically 3 different methods to make a droplets on that can.
First was via displacement map - it was looking really nice, but the render time was just awful.
Second was via particles, that was kinda hard to do (well, easy to do, hard to master), because I don't know how to tweak it properly.
And the third (and currenly used) was quite smart solution. I applied Fur material to the can and make it the shortest lenght possible, which created the droplets (like round spheres basically), then I added some randomness to it and lowered the density a lot. After that I just simply changed the material of it to water and voilá.
You think it look realistic? I'm flattered. Thank you.