I freeze yeast, as well. I buy the big 2 lb. package at Sam's, take out enough to fill one of those small jars and keep the jar in the fridge. The rest stays in the freezer until it's time for a refill. I've frozen it up to a year before and it still works fine (prrof it before using if you have any doubts). I also freeze homemade waffles, homemade uncrustables, bagels, muffins, grated cheese, meat and veggie leftovers for soup, berries I know we won't use in time (don't rinse them first; rinse when you pull them out of the freezer and are ready to use), bread crumbs made from the heels of the loaf, grated zucchini for muffins, pumpkin puree for muffins, and yogurt for smoothies