The cooler that REALLY works at keeping my Dr Pepper potable is this one. I cannot tell you how many coolers, coozies, travel cups, and what nots I have purchased before this one, only to be frustrated and angry that I’ve wasted money and hope yet again. Well, not this time. The best feature is you can use cups, bottles or almost any plastic 12 oz serving, with or without! a neck. You may frown at the price but sigh softly at the pleasure of a Diet Dr Pepper or other libation of your dreams: now an ice cold reality.