aufgezogene Wolle glätten To straighten yarn that has been previously knit/crocheted. A kettle with hot water to just below the spout. Pass the yarn through the lid, and up through the spout, slowly pulling it through so the steam unkinks the yarn.
If your project uses a lot of different colors, you may want to consider a larger container with multiple holes for your yarn, such as these plastic storage bins. And as a bonus, it will make a really intricate cat-toy.