Dry Ice Cold Traps are recommended for pumps when doing rotary evaporation, drying solvents, vacuum distillation, centrifugal concentration or any other process involving volatile solvents. 2.8 L center well that holds a dry-ice and alcohol slurry capable of producing temperatures as low as -79°C (-110°F). Sealed with durable rubber gasket, traps can maintain cold temperature for up to 12 hours. Clear top on center well allows view of trapping surface.