My box of threads contains a mixture of specialised, quilting, cotton and polyester. Yesterday I had trouble finding some machine quilting thread amongst the mayhem, so decided to try and split it into a couple of boxes which meant finding one more to match the ones I already have. It turned out I already had one in my dry goods cupboard in the kitchen, so I 'snaffled' it.
Next little problem was storing spools holding different threads. I had one little spool box storing the overflow from the now full storage in my sewing machine, so I bought another one today. Just need to sort them all out now.