2 liter ice cream containers (sorry, Canadian) are great for cookies in the freezer. They're getting harder and harder to find though. Chapman's is the only one that still has them I think. I tell all our family and friends to buy Chapman's ice cream, and then give me the containers. At Christmas time, everyone gets a tub of cookies for their freezers.
We get flyers in narrow plastic bags. Those are great for putting shoes in when we're travelling. I must have a couple of hundred of those stashed in our travel bin. Which is an old Slow K (potassium supplement) bin. Hubby used to bring those home every couple of months from work, and we used them for lego, action figures, workshop stuff, etc.
My son thinks I'm nuts, but I have a drawer in the kitchen that is full of washed bread bags and ziploc bags.