Weber Go Anywhere grill - what do you use for a bag?

I use the box it came in,, I just cut slots in the top for the handle to stick out,, we have a gas version and the box can hold two maybe three small propane cylinders.
I really like the go anywhere it's perfect for the wife and I!!
Just another note, you can get a stainless steel diffuser plate on ebay,, the original seems to rust out quickly!