There is a special cooler backpack, It’s tough making sure you always have cold drinks on you.  It’s especially tough going to different festivals where it’s extremely hot and the drinks are far overpriced while also being heavily watered down. Thankfully there is this backpack that looks like nothing more than a backpack, that can easily be slung over your shoulder.  With this around it won’t be quite so obvious that you’re carrying around your own personal stash of drinks. Look the picture as follows:

The backpack is completely waterproof and the cooler itself is removable.  Within the cooler it’ll hold 18 of your normal-sized 12oz cans.  It also has a zippered cellphone holder to make sure you can keep your phone handy.  It has extra padding for your back and waist straps that are filled with padding as well.