This here is a humble rice batter packet. To make dosas, idlis, appams and so on.
Leave it in a warm place for a few hours and it fermets - bloats and bloats till it explodes.

Try leaving it in a car to paint the insides white.
(Appam batter ferments quicker than dosa batter. For educational purposes, of course.)

I needed to buy a stand for my monitor - but how do I know if the stand fits my monitor?

The VESA mounting standard defines a set of dimensions for the 4-hole setup behind your monitor, which ensures you can buy any stand for your monitor. Works for flatscreen TVs as well.