This is a new tutorial.....the Tumbler Bag! I think it's really a great shape, the right size, and a simple tutorial? Looks like it anyway! I love the bright colors!!
There's a template you can purchase for the tumbler, or you can make your own. Check it out HERE. This will give you an idea of the size and shape of the template.
If you do make one, would you please send me a picture, and I'll post it.