No, I specifically mean smuggling, so I don't have to buy overpriced [and inferior] beers on the course lol...
I ended up with this:
Amazon.com
I played yesterday morning and the course had signs up prohibiting outside beverages/etc, and I even heard them question someone with a "just water in that cooler, right?" around the check-in desk. Meanwhile I had this in the big pocket of my carry bag with 3 IPAs and a couple water bottles with some slim ice packs and it was totally unobtrusive.
What I was using previously wasn't slim, so I had to pack beers in multiple rows which made it hard to fit the cooler in and even get that pocket closed. With this I could fit up to a 6-pack with ice and it's completely hidden.
It was helpful, too, as I don't think I saw the cart girl until around the 15th hole. I would have been truly parched ;-)
Played a great round, though, I broke 80! (Granted, par on this course is only 60..)