Anyone using solid totes on their Burley Travoy?
 

Just got a used Travoy for a really fair price. I love it.
But I am not too happy with the standard tote bag. It does not really have any structural support at the bottom and if the content is shifting inside the bag, the bag can easily rub against one of the wheels and eating a hole in the bag. I know they have a large shopping bag as well, but this one is expensive.
Is anyone using some other containers on their Travoy? Something like a plastic container? Just trying to collect ideas.

Thanks
Stefan