I also save, collect, repurpose...
I always use empty pill bottles for screws, washers, marbles, one day pill bottles, small trip games/diversions or treats for my grandkids when they travel ( they are fabulous to fill with all kinds of small things to be opened when mom is desperate or when they get to a certain destination), organizing my junk drawer, and "trip souvenirs". My son has a collection of these in his room from all over the country "sand from: "White Sand, NM", "Yellowstone", "Delray Beach, FL", "Indiana Dunes" , small shells and beach treasures from the Great Lakes, Pacific Ocean, Atlantic Ocean, Gulf of Mexico, the Mississippi River... dried up bugs, locust shells, robins eggs, and small dried lizards, or shed snake skins or butterflies he found and wanted to keep (sooo much better than having him collecting things in his pockets! We use a sharpie to write where he got it with the dates and who was on the trip.
They're perfect for all kinds of seeds and can be frozen. They're great fun for geocaching, and help organize game pieces. They work well for collecting spare change in my car, and keeping my car consul neater. We pay for a lot of meds. I hate to throw away those bottles (when you get meds 3 months at a time, the bottles are bigger and can be used for sooo much more!)
We recently raided a recycle bin and got a whole bunch of plain cardboard. We used it between the rows in our garden to keep weeds down.
I use coffee cans as pots for new plants
We drilled holes in the top of an old cooler, filled it with shredded paper, dirt and straw and made a worm bed.
Drier lint make a great fire starter...
Old nylons are fabulous for hanging onions or things you want to dry, and also for tying up tomato plants, blackberry vines, etc...