Robyn and I were just on vacation in Las Vegas.  And in the desert, keeping things cold is hard, especially if your hotel room doesn't have a mini-fridge.  So we used a neat trick we both use a lot in that situation...

I can remember my parents doing this a lot on family vacation when I was growing up; but apparently, a lot of other folks have never thought of this.  So, here you go!

Side note: We've also been known to use the room's trash bin, lined with an unused plastic bag.  It all depends on the size of the containers you want chilled!