I was a big fan of ultra pasteurized when I was using a very poor propane fridge. But I'm finding I can keep non-UHT for 2 weeks or more in summer in fridge0 w

I was a big fan of ultra pasteurized when I was using a very poor propane fridge. But I'm finding I can keep non-UHT for 2 weeks or more in summer in fridge0 when it's the same 0.01-0.5C as the thermal mass.