Qore Performance's IcePlate keeps you cool under your armor while it's frozen, and provides drinking water once the ice inside melts. At a mere one-inch-thick, IcePlate is up to 50% thinner than traditional hydration bladders, according to the company. It is also curved to fit tight with your body and minimize your profile. Fill IcePlate with 50 ounces of water, freeze it overnight, and wear IcePlate under your body armor for three to four hours of conductive and evaporative cooling and a full shift of hydration. As your body heat melts the ice in the container, you'll have ice-cold water to drink.