Disappointed with cooler choices for charging Black Ice? We were. Most soft-sided coolers have little insulation and many of them leak. Black Ice now offers the ultimate solution–the UC1-B. With a heavy duty 1000 denier Cordura nylon outer shell, and high-density open cell foam insulation, the UC1-B is the toughest, most rugged soft-sided cooler we’ve seen. And it works. During rigorous testing, the UC1-B provided enough “recharging power” to allow our researchers to CoolSwap™ their Black Ice for over eight hours in 90°F+ heat. That’s not just cool–that’s very cool. Built to “six pack” size (10″ x 7″ x 7″), the UC1-B is perfect for recharging Black Ice.