I believe that the most discomfort is caused by the "normal" food with 3h shell life. Increase to 4.5h (so total more than 2 real-life days) should be enough with everything else kept as is.
Another consideration: addition of an icebox in the Tier I technologies will help on the early stages of gameplay until players will be able to build a fridge. To keep the balance, icebox should have only a minimal amount of slots and might be a little bit less efficient than a higher-tier fridge (for example, 7 times instead of 10 times of freshness decrease speed).
Another consideration: addition of an icebox in the Tier I technologies will help on the early stages of gameplay until players will be able to build a fridge. To keep the balance, icebox should have only a minimal amount of slots and might be a little bit less efficient than a higher-tier fridge (for example, 7 times instead of 10 times of freshness decrease speed).