Armed with my large hook and the spool of yarn, I got set to playing. I even bought handles ready for a a bag, although these weren't the ones I originally bought for this project.
The yarn is wound around a board tube, so doesn't unwind as easily as a ball of wool, and the yarn is thick and can be quite tough to work. I ended up with a blister on my thumb, but I'm sure it would toughen up in time. This bag is crocheted, and although quite easy to do, it's quite a work out. I'm pleased with the end result though, so much so, I decided I needed to have another play. I've tried crochet, now I need to try and knit with it.
Someone on Facebook asked if this was soft, the answer is no. It feels like you're working with rope, you end up with a very stiff fabric, which has some weight to it and feels hard wearing. Being firm, you're not going to be losing the contents of your bag. For bags, it should work well.
If you've tried t shirt yarn, I'd love to hear how you got on with it? Would you use it again? I would, and I'm going to be making some of my own. When I do, I'll show you how.