Step 2: Construction
Form a coil with the copper tube, leaving a long lead-in. I wrapped around a demi.
Drill a hole in the bucket, and poke the lower end of your coil through this.
The copper tube is connected to the pressure-cooker with a (brewing) cork
A bit of Blu-Tac seals the tube to the bucket
Fill the bucket with cold water, and maybe some ice.