There's a simple joy in using products that you know will have many purposes over the years. The only thing that can improve upon that are small simple, additions that'll save you time and energy — just like these casters!
A perfect example of this was recently done by Stephanie Lynn over at Under The Table and Dreaming. She took an ordinary galvanized bucket and added some wheels. These particular wheels have a rubber lining around them to help protect floors.
They make pretty little planters but would also be awesome for laundry, library books, extra blankets or even toting around tools while doing a diy project. The bucket was great as it was, but with the addition of casters it went from functional to fabulous!