Most freeze blocks or packs I've bought are always just a little too bulky & l end up playing a messed up version of tetris trying to pack everything so I can get the lid closed on my cooler (whether a hard or soft case), which results in me wanting to get to my destination ASAP so I can empty my cooler & get the contents into the fridge, because I could never get even cooling of my food. With this sleek freeze block, however, I don't think I'll run into that issue again. This block is shaped to fit PERFECTLY on top of six 12 ounce cans or whatever edibles you're packing & then slide the lid over & close it without any obstructions. My days of playing tetris with my cooler are OVER. :) Thanks, Igloo!!!