One of my least favorite parts of the brew day BY FAR is getting the spent grain out of my 72 quart picnic cooler. I always spill at least a little and it's just a pain in general. After seeing a BIAB thread I had an idea - what if I lined the cooler with a large straining bag? I see that Midwest has 2'x3' ones that should work. Then I can just dump/rinse the bag after sparging and rinse the cooler - done!