FoodSaver Bags: Dice the roasted Hatch Chiles, and store them in airtight bags. FoodSaver bags are ideal, as you want to keep as much air out of the bag as possible because the chiles get mushy if ice crystals form on them. Good for up to 12-18 months in the freezer. Zip-Top Bags: Alternatively, use a small zip-top bag, and press all the air out before sealing and freezing. Good for up to 4-6 months in the freezer.