Clean oil drum I found and wrapped in cheap insulation. Fill it about half to 2/3 full of water. Freeze Tupperware filled with water. (Big ice cubes) dump in with you. Go neck deep starting with 3 minute sessions. You will naturally want to go longer over time. Don't go over 15 minutes.

Some serious guys go like an 2 hours but they are heavily monitored and doing to break records. I'm sure you'd come out cancer free after 2 hours or dead. 🤷 I've considered it.

Clean oil drum I found and wrapped in cheap insulation. Fill it about half to 2/3 full of water. Freeze Tupperware filled with water. (Big ice cubes) dump in with you. Go neck deep starting with 3 minute sessions. You will naturally want to go longer over time. Don't go over 15 minutes.