A large cooler used for fishing got a crack in the outer side side of its lid. Now I use it to store my own mix of peat moss and perlite used for growing seedlings and filling flower pots.
Here's one of my favorites because it beats what is commercially available without spending more money than I think is reasonable. I make permanent plant tags out of cut open aluminum beer or soda cans. Just cut them to the size you like then write the name and whatever info you want with a dull pencil or a non-working ball point pen. Press really hard to emboss the words. The embossed words will last forever. This is how I keep straight all the different the heirloom tomato plants my gardening buddy always gives me. I fold over one edge of the tag and hang them on my tomato cages which are made from concrete reinforcing wire. Usually I staple them when they are folded over, but it isn't necessary if you make the fold generous enough.
Here's an odd one. Today I was going by a city park and saw that someone had saturated the corners with sleazy advertising signs made like the "open house" signs real estate agents use. It bothers me to see the park crapped up like that

, so I stopped the car and pulled up the two nearest me. I took them apart to throw them in the nearby trash can, but then I decided I could use the metal frames which stick into the ground. I'm going to use them as a temporary barricade to keep our letter carriers from walking through my flower bed

, which I have seen them do over and over this spring. Tomorrow when I go by the park, if the others are still there I'll trash the sings and pick up another couple frames to complete the barricade. I have used the same sort of sign frames as plant supports too.