thanks for the input. I feel I should not necessarily defend myself but kind of represent why I brought 4 sodas on the last backpacking trip: almost purely to see if it would keep them cold enough and if it was a viable option. I also have a motorcycle and do some longer motorcycle rides and figured it would be cool to carry some soda's on that where weight is almost not an issue at all (if you can maneuver with the backpack on your back it should be fine). So it was kind of a test for that but I will admit it was a really nice feeling cracking into a can of Dr. Pepper or Coke miles away from anything else.