Keeping Miller Lite Home Draft Cold

I'm going camping with the guys this weekend and wanted to take one of the Miller home draft bottles filled with homebrew. Any ideas on how to keep this thing cold? We typically just throw the kegs in a small stream but that's not gonna work with this. If it could be stood up, I'd just throw it in a cooler and be done with it.

Here's what I've thought of so far:

Styrofoam cooler with hole cut in side for tap.
Insulated bag of some sort
Small cooler that it fits in without modification (someone did this but I can't find the post)
Modifying a cooler to have the tap on the outside - I didn't want to ruin a cooler yet without seeing how this is going to work.

Seems like the cheapest/easiest might just be the styrofoam cooler. Thoughts?

go with your plan its cheapest and will keep beer cold

-=Jason=-

This might be the thread you were looking for:
https://www.homebrewtalk.com/f51/my-extra-small-portable-kegerator-238490/

Go to www.homedraftcooler.com to find a Styrofoam cooler that fits this package like a glove

Go to www.homedraftcooler.com for a clever alternative to keep your home draft ice cold.