i got one with regular black fluid. a bit smaller than i thought it would be, but it makes a cute desk ornament. i ordered one with a blue light, so there is a matching blue plastic film on the top. the film looks pretty cheap which would be fine... if mine didnt arrive slightly peeling off. disappointing for the price it was, but oh well.
it also makes a small clicking noise when the device is on, which is really quiet, but i still noticed it. i find it negligible, but if youre irritated by slight sounds like ticking clocks, i wouldnt plug it in in your bedroom at night. otherwise, the fluid moves nice and is fun to play with.
The blue plastic on top is just a protective film so the metal doesn't get scratched during shipping. You can just peel it off