Please take this kindly as I'm not making fun, but I busted out laughing when I noticed you specified a "frys" milk jug.

What about those poor folks who do not have a Fry's in their community!

The frozen milk jug is a great idea though. In my Arizona heat, the iced jug will almost immediately begin forming droplets of condensation on the outside though so I don't think I will need to put the slits. What are the summer temps in your area? Oh, duh, you are also in Arizona.

That's what I get for teasing you.