I love project bags. I can never have too many of them, either. I swear my knitting WIPs exist so I can make more project bags. So take a peak at my latest two bags, both on sale in my Etsy shop.
This one is my Batik medium project bag, and it easily holds 4 skeins of sock yarn!
This one is Tea Party Small Project Bag, and it holds 2 skeins of sock yarn.