I save used toothbrushes and the plastic bags from newspapers.
Used toothbrushes make great laundry and cleaning aids. Newspaper bags are a requirement when walking the dog. We are on the same page!
But do you wash, rinse and dry zip-lok bags? (I hope my sons aren't reading this! Actually they left home long ago) I have a friend who raised 7 children who washed straws! She is now living very comfortably in retirement because she watched her pennies. It really does work!