Is that nitro glycerin or some other liquid?

This is the fluid for the windshield washer system of the car. 24 hours in the freezer and then put the glans in.

geile Sau - du läßt nichts aus! War die Eichel nicht ziemlich tot nach dem einfrieren? ich hatet mal vorhaut steif gefroren, so daß ich sie brechen konnte! die hat ewig gebraucht wieder zu heilen irgendwie. war die Eichel dann ncith taub für immer??

How painful was it to freeze your cock head? Did the freezing move up the shaft? I thought of using dry ice and isopropel alcohol. That will get to -90C(-130F). Don't want the cold freezing bladder or other internal parts.

The freezing itself was actually completely painless. At the beginning, i.e. when immersed in the liquid, it became briefly cold. After that I felt nothing more.