The other day I noticed that my local Albersons sold dry ice - so (much to Bren's horror) I purchased a 5lb block.
I used some of it, and without thinking about it - I put the rest in the freezer to last until the next day. Sure the dry ice is -100F & the coldest our freezer can go is *maybe* 20F, but it's still quite a bit colder than an insulated ice chest and an outside ambient air temp of 90F.
That was a big mistake. You see the extreme cold of the dry ice turned off the freezer & all the frozen items melted :(

Live, Learn, and buy new groceries.