That particular Peltier module doesn't look completely useless, but it has far too small heatsink on the hot side to be really useful. I'd expect you could run it at about half the rated power (i.e., at 9V, 4.5A), and get about 10-15W of actual cooling power out of it when cooling to about 10-15 degC below ambient. I'd guess it can't go much more than 20 deg below the ambient, no matter how carefully you insulate your things being cooled. And cooling anything down will be super slow.
Really meaningful cooling is quite difficult to achieve with Peltiers. The COP is around 100% in optimal case (dT=0), which is already unremarkable compared to compressor systems achieving over 500% in similar conditions, and worse, the available cooling power diminishes linearly with the temperature difference between the sides, and is already zero at around 50-60 degC difference. This means, to get even half of the rated cooling power, temperature difference between the sides needs to be about 30 degC. Now, if you want to cool things down 20 degrees below the ambient, this only leaves you 10 degree difference between the ambient and the hot side - necessitating huge, well designed heatsinks. Look at a combination of thick heatsink base which spreads the heat on a large number of fins, combined with a large number of fins.