This just seems like a great idea. Not sure why you can’t do it with your regular, old current laundry bag… but still a neat idea. (Note: I just tried punching my laundry bag a minute ago and it seemed to do no damage to the bag and my noted aggression was put at ease.) Why do I have boxing gloves in my bedroom? Well, you mind your business.
If you want to get real fancy and buy one, see here. I took note of this item from this beauty of a site.