I have tried a few things to make my bread last longer and fresher, one of which was already mentioned and that is to use honey instead of sugar. I do not put my bread in the fridge as it may 'seem' fresher but it get kind of soggy from condensation and grows to mold quicker. If for some reason I don't finish the bread I use it for stuffings, bread pudding, or if it's not too hard then toast. Store bought bread sure is easier to buy, but making it is cheaper, fresher, you know what goes into it, and to me tastes a heck of a lot better.
I leave mine on the counter in a thick towel and now only make one loaf at a time. I used to make 3 because it seemed like a waste of time to make one loaf, but if I have the time it's easier to knead than 3 and I know I will eat the 1 loaf and none of it will go to waste.
But now you got me thinking about this "birch box". Any more info on this?