Trockeneis
The dry ice used can be in solid pellet form or shaved from a larger block of ice. The shaved ice block produces a less dense ice medium and is more delicate than the solid pellet system. In addition, pellets may be made by either compressing dry ice snow, or using tanks of liquid CO2 to form solid pellets. Dry ice made with compressed snow breaks apart more easily and is not as aggressive for cleaning.