The DynaQube can keep your sample at low temperatures for long periods. 20 sample compartments in each block, sizes from 0.2ml to 2ml, simply change format of the compartments when you need different sizes. The unit can also use the ceramic-coated aluminum beads to accommodate various sample vials at the same time. There are two different models: DQ-I, the analog device, keeps your sample at 0°C, and DQ-II, with display and setting, you can adjust temperature from 0°C to any set point lower than room temperature.