My agenda is to attach bachelor buttons on all my pants including blue jeans (suspenders can easily be improvised) because I will be loosing a lot of weight and my belt may not fit anymore.

I suggest you carry a GI type of can opener (p38 or p51) in your wallet or keychain and you will not look as silly as Christian Bale in "Empire of the Sun" or Adrien Brody in "The Pianist" when you find canned goods while rummaging for food.