V Stitch Bag
There are instructions for a specific sized bag, but there are also instructions on how to make the bag larger or smaller. You can also use bulky weight yarn and a size J hook to make it as well.
For some of my bags I single crochet the base. If you do that then you need to make less rounds for the base. That is because when you switch to hdc, it will keep making the bag wider for a little while.