Small enough to fit in the palm of your hand, the DyNA Chill™ holds 12 x 1.5/2.0mL tubes. Ideal for storage of enzymes and transporting of samples, this portable cooler requires no ice. Proprietary refrigerant in the sides, bottom and lid surrounds samples in cold. The DyNA Chill™ is available in two versions, 0°C and -15°C. Both will keep samples cold for eight hours or longer.