It's good to reuse things you own.
Matt makes bread and typically stores it in large freezer bags after it is done cooking.
Matt wants to have a constant supply of freezer bags.
Matt rinses and reuses the freezer bags once the bread is eaten.
Matt uses a new freezer bag for each new loaf of bread and throws out the old one.
Matt almost never has to buy freezer bags as the old ones last for several batches.
Matt's grocery budget increases by $5-10 a month, and he has more trash to throw out.