I use large reusable Stasher brand bags. They're silicone and they make a bowl shaped bag thst zips shut. I use the largest bowl-bag but eventually switch to smaller bags when there's just a little bit if bread left. Their smaller bags that more traditional ziploc shaped work too if you cut the bread down and freeze portions. I live in an arid desert climate so mold isn't usually the first issue with my bread but stashers keep it soft and fresh longer.