That's such a thoughtful present. I was reading the news today that the England women football team have been having some sort of freezing cryo treatment to help relax their muscles, so the ice bath must be good for you. Can you relax and lean back in there as it looks like it might topple over and a little cramped for a tall guy.
BTW, love your large garden!
RE: Brrrrrriliant idea to take an Ice Bath