Review on High-Quality Polyethylene Transport Packaging & Shipping Supplies for Industrial, Healthcare, and Beyond by David Edwards

I've seen many reports of leaks and insufficient thickness of the bags. I've used almost half of the order and not a single bag has spilled. I double the bag anyway, just to be on the safe side. If you think the bag isn't thick enough, don't buy the 2 mil bag either. They are the same thickness as pet store bags so I'm not sure what you were expecting.